Astrophotography
 

February, 1997. A Picture Perfect Comet
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
December, 1973. A Cold Camera for Astronomical Photography and Cardboard Segments for Big Paraboloids
Cost:$100+	Difficulty:	Danger 3: (Serious injury possible)	Utility:
August, 1969. Color Photographs of the Night Sky Are Made By Refrigerating the Film
Cost:$0-100	Difficulty:	Danger 3: (Serious injury possible)	Utility:
July, 1969. The Metabolic Rate of Small Animals Is Measured in a Homemade Apparatus
Cost:$0-100	Difficulty:	Danger 2: (Minor injury possible)	Utility:
December, 1965. Deep Sky Photographs with a 35-Millimeter Camera and More about the Homemade Laser
Cost:$100+	Difficulty:	Danger 2: (Minor injury possible)	Utility:
June, 1956. Concerning the Problem of Making Sharper Photographs of the Planets
Cost:$100+	Difficulty:	Danger 2: (Minor injury possible)	Utility:
June, 1956. Concerning the Problem of Making Sharper Photographs of the Planets
Cost:$100+	Difficulty:	Danger 2: (Minor injury possible)	Utility:

Celestial Mechanics
 

January 2000. Detecting Extraterrestrial Gravity
Cost:$100+	Difficulty:	Danger 1: (No Hazards)	Utility:

August, 1975. Graphs That Predict When Planets Will Line Up with Another Planet or the Sun Cost:$0-100 Difficulty:  Danger 1: (No hazards) Utility: 
May, 1974. A Plotting Device for Predicting the Orbit of an Earth Satellite Cost:$0-100 Difficulty:  Danger 1: (No hazards) Utility: 
January, 1969. Simple Ways to Calculate the Orbits of Space Vehicles Cost:$0-100 Difficulty:  Danger 1: (No hazards) Utility: 
October, 1958. Mostly about Ingenious Ways of Studying Artificial Satellites Cost:$0-100 Difficulty:  Danger 1: (No hazards) Utility: 
January, 1958. Mostly about How to Study Artificial Satellites Without Complex Equipment Cost:$0-100 Difficulty:  Danger 1: (No hazards) Utility: 
November, 1955. On the Making of Recording Instruments and a Moving Model of the Solar System Cost:$0-100 Difficulty:  Danger 2: (Minor injury possible) Utility: 

Deep Space Objects
 

February 2000. Gamma-Ray Bursts Come Home
Cost:$100+	Difficulty:	Danger 1: (No Hazards)	Utility:
November, 1992. Sighting Cepheid Variables
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
May, 1992. Watching the Death of a Star
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
January, 1972. Groups Are Organized to Observe the Eclipse of Stars By the Moon
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
January, 1955. About Utilizing the Moon to Occult the Stars and Increase Telescope Resolution
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:

Lab Techniques
 

February, 2001. Counting Particles from Space
Cost:$100+	Difficulty:	Danger 1: (No Hazards)	Utility:
January, 1997. Catching a Comet By Its Tail
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
April, 1970. An Ambitious Observatory Is Built By Father and Son
Cost:$100+	Difficulty:	Danger 2: (Minor injury possible)	Utility:
March, 1952. Determining Latitude/Focogram
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
December, 1951. Mirror Grinding in the Kitchen, Roger Hayward's Foucault Tester, Mirror Making Instructional Films
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
November, 1950. Herschel Wedge Prism/Cutting Wedge Disks
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
August, 1950. Focograms
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
June, 1950. Mirror Making
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
May, 1950. Draper Grinding Machines
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
June, 1949. Setting Circles, Testing Mirrors with "Oil Flats"
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
March, 1949. A 10" Telescope, Dry-Paper Dry Rouge Polishing, Telescope Mounts on Buildings
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
February, 1948. Abrasives, with Focus on Diamond Abrasives
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
August, 1947. Operating Draper Machines. Schupmann Telescopes.
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
July, 1947. More Ways to Work Larger Mirrors. Broadhead's Draper
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
June, 1947. Making Thin Mirrors
Cost:$0-100	Difficulty:	Danger 2: (Minor injury possible)	Utility:
May, 1947. Mirror Thickness
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
April, 1947. Cerium Oxide and Other Polishing Agents.
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
March, 1947. Porter's Grinding Machine. Inexpensive Mirrors.
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
January, 1947. The Pencil Test
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
November, 1946. Rose Tools
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
June, 1946. Profile: Russell Porter. How Polishing Works.
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
May, 1946. Casting Lenses or Mirror-Grinding Tools in the Kitchen.
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
January, 1946. Grinding/Polishing Machine - Continued. More on Pitch Laps.
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
December, 1945. Another Grinding/Polishing Machine
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
November, 1945. Another Method of Making Mirrors, Conclusion
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
October, 1945. Another Method of Making Mirrors
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
May, 1945. Making Achromatic Objective Lenses, Concluded
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
April, 1945. Making Achromatic Objective Lenses, Continued
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
March, 1945. Making Achromatic Objective Lenses
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
January, 1945. Testing Optical Surfaces
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
September, 1944. Grinding/Polishing Machine, Mirror Testing, Barlow Lenses, Coarse Diffraction Gratings
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
April, 1944. Making Optical Flats
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
February, 1944. Mirror Grinding Problems/Solutions, Tower Domes, 20" Cassegrainian
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
August, 1943. Glass Imperfections, Resin Mirrors? Mirror Tests, Sundry News.
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
April, 1943. Amateur Telescopes, Mirror Grinding Tips, Schupmann Telescopes
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
March, 1943. Grinding Machines, Sundials
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
December, 1941. Grinding Machines, Jobs for Telescope Makers
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
August, 1941. Telescope Drives. More Mirror Testing Methods.
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
April, 1941. 20" Mirrors, a Simple Grinding Rig. Diagonal Mirrors
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
March, 1941. A Broken Glass Tool, Spectroscopes, a Grinding Machine.
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
April, 1939. Avoiding Astigmatism in Mirror-Making. More Mountings for Beginners.
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
February, 1939. Measuring Angular Separation, Schmidt Cameras, a Chronograph and Mounting Diagonals for Beginners.
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
January, 1939. Aluminizing Equipment, Strain-Testing Glass, Pitch Lap Manufacture.
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
December, 1938. Physical Properties of Glass Applied to Mirror Making
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
November, 1938. Mirror Grinding Machines
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
July, 1938. RFT Cassegrainians, Wax Coating Laps
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
August, 1937. Aluminizing Mirrors, Some Knife-Edge Test Devices.
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
July, 1937. An Evaporation Chamber, Designing Barlow Lenses, Metal Mirrors, Sources of Rouge
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
June, 1937. Making Eyepieces, Clyde Tombaugh's Work, Another Auto-Guider, Barlow Lenses, More on the Hale 200".
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
May, 1936. Schmidt Cameras, Device for Reading Setting Circles, a Very Small Observatory, a Proposed Telescope Drive.
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
April, 1935. Working with Small Lenses
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
March, 1935. Cassegrainians, the Ronchi Test, Using Sub-Diameter Grinding Tools
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
February, 1935. Working with Convex Spherical Surfaces
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
October, 1934. Slow-Motion Declination Mount, Polishing Hints, Checking a Mirror's Polish
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
September, 1934. Accuracy of the Knife-Edge Test
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
August, 1934. More on Automatic Grinding
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
July, 1934. Another Automatic Mirror Grinder
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
April, 1934. Grinding Machines
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
July, 1932. Knife-Edge Tests, Lap Media
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
June, 1932. Focograms
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
April, 1932. Dangers of Silvering Mirrors
Cost:$100+	Difficulty:	Danger 3: (Serious injury possible)	Utility:
January, 1932. Making Mirrors From Pyrex Pie Plates? More Amateur Telescopes
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
August, 1931. A Mirror Grinding Machine, a "Spark Plug" Telescope Mount
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
July, 1931. Making Objective Lenses
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
January, 1931. Optics and Temperature Problems
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
July, 1929. Mirror Grinding Machines, Seismology?
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
June, 1928. Two New Methods of Grinding and Polishing Mirrors
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:

Lunar Astronomy
 

January, 1972. Groups Are Organized to Observe the Eclipse of Stars By the Moon
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
December, 1960. Two Amateurs Calculate the Exposure Needed to Photograph a Lunar Eclipse
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
January, 1955. About Utilizing the Moon to Occult the Stars and Increase Telescope Resolution
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
March, 1954. About Snakes, the Other Side of the Moon and Unusual Telescopes to Follow Rockets
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
August, 1949. Observing the Moon, Defraction Gratings, Small Eyepieces, Cassegrainian Mirrors
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
December, 1928. Solar Spectroscopes, Photographing the Moon.
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:

Planetary Astronomy
 

November, 1985. How Best to See Halley's Comet While It Is in View During the Next Few Months
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:

Radio Astronomy

February, 1962. About Two a Radio Telescopes That Were Made By Amateurs
Cost:$100+	Difficulty:	Danger 2: (Minor injury possible)	Utility:

Solar Astronomy
 

August, 1999. Sun of a Gun
Cost:$0-100	Difficulty:	Danger 3: (Serious injury possible)	Utility:
August, 1990. How to Monitor Ultraviolet Radiation From the Sun
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
June, 1990. Sunspots and How to Observe Them Safely
Cost:$0-100	Difficulty:	Danger 3: (Serious injury possible)	Utility:
March, 1987. Calculating the Distance to the Sun By Observing the Trail of a Meteor
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
May, 1972. Advice Is Offered on Equipment and Safety Procedures for a Forthcoming Solar Eclipse
Cost:$0-100	Difficulty:	Danger 2: (Minor injury possible)	Utility:
January, 1961. An Amateur Makes Spectra of the Aurora and Photographs the Sun's "Green Flash"
Cost:$100+	Difficulty:	Danger 4: (POSSIBLY LETHAL!!)	Utility:
September, 1960. How a Group of Amateurs Detected Flares on the Sun with Long-Wave Radio Receivers
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
August, 1959. A Sundial That Shows How Any Spot on the Earth Is Lit By the Sun At Any Time
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
April, 1958. An Amateur Builds a Spectroheliograph to Observe Details on the Disk of the Sun
Cost:$100+	Difficulty:	Danger 2: (Minor injury possible)	Utility:
October, 1957. The Surface Details of the Sun Are Revealed By a Small Telescope and Artful Photography
Cost:$100+	Difficulty:	Danger 3: (Serious injury possible)	Utility:
January, 1957. About Amateur Observations of the Aurora During the International Geophysical Year
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
September, 1955. About the Making of a Coronograph to View the Prominences of the Sun
Cost:$100+	Difficulty:	Danger 2: (Minor injury possible)	Utility:

Sundials
 

August, 1990. How to Monitor Ultraviolet Radiation From the Sun
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
May, 1981. About Phosphenes: Luminous Patterns That Appear When the Eyes Are Closed
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
December, 1980. The Physics of the Patterns of Frost on a Window, Plus an Easy-to-Read Sundial
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
November, 1967. How to Make an Electrochemical Cell and Also an Unusual Kind of Sundial
Cost:$0-100	Difficulty:	Danger 4: (POSSIBLY LETHAL!!)	Utility:
May, 1966. A Rain Gauge, a Fluid Flip-Flop, a Sundial and a Way of Seeing Crystals As They Grow
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
March, 1964. Two Devices for Listening in on Underwater Sound, and a Sundial That Tells Clock Time
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
October, 1959. A Transistorized Drive for a Telescope, and a Sundial That Keeps Accurate Time
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
August, 1959. A Sundial That Shows How Any Spot on the Earth Is Lit By the Sun At Any Time
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
March, 1956. On the Scientific Study of Tropical Fish and a Sundial for the Ceiling of a Room
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
October, 1954. On the Collecting of Moths and Butterflies, and Some Ingenious and Attractive Sundials
Cost:$0-100	Difficulty:	Danger 3: (Serious injury possible)	Utility:
September, 1953. About Sundials and the Cyclotron, the Latter Built By a Group of Bold High School Boys
Cost:$100+	Difficulty:	Danger 3: (Serious injury possible)	Utility:
September, 1951. Sundial and Calendar in Flask/Dall-Kirkham Tel
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
May, 1948. Introduction to the Hobby. Euphonium Reflector, Sundials
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
March, 1943. Grinding Machines, Sundials
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
February, 1943. Amateur Telescope, Sundials, Eyepieces, Making Abrasives Go Further.
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
August, 1940. Monk Telescope Makers, Sundials
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:

Telescopes
 

February, 2001. Counting Particles from Space
Cost:$100+	Difficulty:	Danger 1: (No Hazards)	Utility:
January 2000. Detecting Extraterrestrial Gravity
Cost:$100+	Difficulty:	Danger 1: (No Hazards)	Utility:

February 2000. Gamma-Ray Bursts Come Home
Cost:$100+	Difficulty:	Danger 1: (No Hazards)	Utility:
August, 1972. A Compact Short-Focus Telescope with Spherical Optical Surfaces
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
November, 1963. How to Grind, Polish and Test an Aluminum Telescope Mirror
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
August, 1963. A Large Telescope for a Home Observatory and a Light Meter for Use in the Darkroom
Cost:$100+	Difficulty:	Danger 2: (Minor injury possible)	Utility:
November, 1959. How to Construct a Remarkably Simple But Serviceable Six-Inch Reflecting Telescope
Cost:$0-100	Difficulty:	Danger 2: (Minor injury possible)	Utility:
October, 1959. A Transistorized Drive for a Telescope, and a Sundial That Keeps Accurate Time
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
May, 1958. A Refracting Telescope in Which the Main Lens Consists of Only One Piece of Glass
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
June, 1955. An Observatory Built By a High-School Senior and How to Construct a Famous Spectroscope
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
July, 1954. About Binoculars That Are Out of Line and a Telescope Built By a Group of Schoolboys
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
April, 1954. On a Well-Made Refracting Telescope and Testing Airplanes in the Bathtub
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
November, 1953. Mainly about the Theory of Color Harmony and A New Book for the Telescope Maker
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
February, 1953. About a Portable Terrestrial Telescope and the Enjoyment Chromatography
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
February, 1952. Obsidian Mirrors/Telescope Death
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
January, 1952. John S. Steward Telelescope
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
November, 1951. An Alarm Clock Drive for Portable Telescopes, a Car Wheel Spindle Mounting
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
October, 1951. Eliminating Eyestrain From Binoculars
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
September, 1951. Sundial and Calendar in Flask/Dall-Kirkham Tel
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
August, 1951. Flohr Portable Telescope/Abolition of Edge Diffraction
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
July, 1951. Synchronome Impulse Clock/Foucault Test Apparatus
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
June, 1951. Combined Simple and Compound Telescopes/Achromatic Brachytes
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
May, 1951. A Telescope in an English School/a Johnsonian Telescope with Fixed Mirrors
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
April, 1951. Engineering a Telescope Mount
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
March, 1951. Transportable Telescope/Stolle Telescope/Telescope Optics Principles
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
February, 1951. Mirror Making and Alignment
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
January, 1951. Towards a Giant Telescope
Cost:$100+	Difficulty:	Danger 0: (NA)	Utility:
December, 1950. Schlesman Telescope
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
October, 1950. Hamilton Terrestrial Telescope
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
September, 1950. Potpourri of Amateur Astronomy
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
July, 1950. A Portable Springfield Variant Mount
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
April, 1950. Observatory Housings, More on Paper Laps
Cost:$100+	Difficulty:	Danger 2: (Minor injury possible)	Utility:
March, 1950. Gee Refractor Telescope
Cost:$100+	Difficulty:	Danger 2: (Minor injury possible)	Utility:
February, 1950. Spectroscopes
Cost:$0-100	Difficulty:	Danger 2: (Minor injury possible)	Utility:
January, 1950. Ulram Refractor
Cost:$0-100	Difficulty:	Danger 2: (Minor injury possible)	Utility:
December, 1949. Lick Observatory, Maksutov Telescopes
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
November, 1949. Star Cameras
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
October, 1949. Measuring and Testing Mirrors
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
September, 1949. Johnsonian Telescope
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
August, 1949. Observing the Moon, Defraction Gratings, Small Eyepieces, Cassegrainian Mirrors
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
July, 1949. Easier Ways to Grind Large Mirrors, Dawes' Limit, Double Star Observing
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
May, 1949. Porter's Crater. Amateur Telescopes
Cost:$0-100	Difficulty: NA	Danger 0: (NA)	Utility:
April, 1949. Death of Russell Porter
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
February, 1949. The Hale Observatory
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
January, 1949. Variable Star Observers. Polar Telescope.
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
December, 1948. Plastic Optics
Cost:$0-100	Difficulty: NA	Danger 0: (NA)	Utility:
November, 1948. Springfield Mountings. Mirror Shadows
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
October, 1948. Swiss Amateurs. Barnesite
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
September, 1948. Pros & Cons of Different Focal Lengths, the Schaldach Mount. Cassegrain Telescopes
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
August, 1948. Making Simple Eyepieces
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
July, 1948. An Extraordinary Amateur Scope
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
June, 1948. Observatory Domes. Polishing Tips.
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
May, 1948. Introduction to the Hobby. Euphonium Reflector, Sundials
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
April, 1948. Portland Observatory. Mahar-Thomas Tester. Reflector Lenses and Materials.
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
March, 1948. The Hale Telescope, More on Diamond Abrasives
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
January, 1948. The Hale Mirror. British Vs. American Eyepieces & Focus Controls
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
December, 1947. Pocket Telescopes
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
November, 1947. Erecting Images with Porro Prisms, an Amateur Telescope
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
October, 1947. Maksutov Telescopes
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
September, 1947. Terrestrial Telescopes, Image Erection, Objective Lenses
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
February, 1947. Mid-Difficulty Telescopes. Domes, Houston Beam-Shifter.
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
December, 1946. Zeiss Mountings
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
October, 1946. Mirror Cells and Focusers on 12" Telescopes
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
September, 1946. More on Compound Telescopes
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
August, 1946. Simplifying the Cassegrainian (Dall-Kirkham)
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
July, 1946. Weight-Driven Drives. Silvering. Young Telescope Makers
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
April, 1946. Long-Focus Refractors
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
March, 1946. Inexpensive Telescope Drive, an Interesting Semi-Portable.
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
February, 1946. Building Mounts with Junk, Long-Focus Newtonians
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
September, 1945. Newton on "Opticks," Early Reflectors
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
August, 1945. Binoculars, Porro Prisms, Other Materials for Grinding Tools.
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
July, 1945. Amateur Scopes, Beginner's Woes, Interrupted Grinding
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
June, 1945. Permanent Piers, Spider Diffraction
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
February, 1945. Air Currents in Reflector Tubes, More on Optical Testing
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
December, 1944. More on Maksutov Telescopes
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
November, 1944. Roof Prism Makers
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
October, 1944. The Maksutov Telescope
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
August, 1944. All about Binoculars
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
July, 1944. Variations on the Gregorian
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
June, 1944. A Collapsible Telescope
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
May, 1944. A Modified Gregorian for Terrestrial Use, the Death of J. H. Hindle.
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
March, 1944. Grating Spectrograph
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
January, 1944. Temperature Effects, Clock Drives
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
December, 1943. Amateur Telescope. Channeling/Cutting Pitch, Gauging Mirror Concavity, Repairing Broken Glass Tools
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
November, 1943. Auto-Collimation, the Clark Telescope Makers
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
October, 1943. RFT Telescopes, Why Aluminum Doesn't Make Good Mirrors
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
September, 1943. Amateur Telescopes for Education, Setting Circles, Barlow Lenses
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
July, 1943. Cassegrain Optical Mathematics
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
June, 1943. Collimation of Optical Elements
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
May, 1943. Roof Prisms (an Addendum to the Article "a Hobby Goes to War", P. 202f.
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
February, 1943. Amateur Telescope, Sundials, Eyepieces, Making Abrasives Go Further.
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
January, 1943. Amateur Telescopes, Housings, Pitch Lap Materials, Prism Tests.
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
December, 1942. The 200" Hale Drive, Protecting Optics From Moisture
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
November, 1942. An Unusual Turret Telescope, Half Silvering, a Simpler Drive.
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
October, 1942. Metal Mirrors
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
September, 1942. The 200" Hale, Mirror Tolerances, Cassegrains, Domes, Other Pitch Lap Tricks
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
August, 1942. More on Spectroscopes
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
July, 1942. Amateur Spectroscopes
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
June, 1942. An Improved Alt-Azimuth Mount, Making a Synchronous Motor for Your Drive
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
May, 1942. Mexican National Observatory's 24" Schmidt Camera, Perils of Short Focal Length Telescopes
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
April, 1942. The Macdonald Observatory 82" Mirror, Concluded
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
March, 1942. The Macdonald Observatory 82" Mirror
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
February, 1942. The 200" Hale Mirror, Concluded
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
January, 1942. The 200" Hale Mirror
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
November, 1941. Amateur Telescopes, New Printing of Amateur Telescope Making, a New Method of Zonal Testing
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
October, 1941. Profile of R. W. Porter, Star Laps, Parabolizing a 12", Controlling Rouge Fineness, Objective Lens Mathematics
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
September, 1941. Semi-Portables, an Automated Star Camera, Finding Out-of-Print Astronomy Books
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
July, 1941. Amateur Telescopes and General News. 24" Mirrors, Testing Cassegrainian Mirrors.
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
June, 1941. A German Amateur Telescope, Cutting Pitch, Abrasives, a Clock Drive.
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
May, 1941. Amateur Telescopes, Quick-Change Eyepieces. Gadget for Mounting a Diagonal.
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
February, 1941. Amateur Telescopes, an Objective Grating, Amateur Astronomy Related Sculpture.
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
January, 1941. Schmidt and Wright Cameras
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
December, 1940. Boston Amateur Telescopes, Photos of Palomar Mount. Bubbles in Pyrex, Leonardo Da Vinci's Grinding Machines
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
November, 1940. Observatories, Turret Eyepiece Holder, a Penetrometer, Fine Abrasives
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
October, 1940. Springfield Mountings. Flat Diagonals Vs. Prisms
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
September, 1940. Amateur Telescope, Observatories, the Hartmann Method of Testing. From Amateur to Pro.
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
August, 1940. Monk Telescope Makers, Sundials
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
July, 1940. Refractors, Silvering, Alt-Azimuth Mounts, Other Cooling Media for Grinding
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
June, 1940. The Goethe Link Observatory, a New Silvering Technique
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
May, 1940. Off-Axis Telescopes, Cassegrainians, a Strobotelescope
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
April, 1940. Making Refractors. a Borosilicate Glass Mirror, a Beginner's Sphereometer, about Rouge
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
March, 1940. More Amateur Telescopes. Finding Latitudes. the Gaviola Test for Mirrors. (Beg. Corn. "Seeing")
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
February, 1940. A Home Observatory, Measuring Lenses, the Palomar Dome.
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
January, 1940. Some Amateur Telescopes. Testing Mirrors, Flats, Testing Cassegrain Mirrors. (Beg. Corn. "Semi-Portability") Solar Telescopes
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
December, 1939. An Amateur Spectroheliograph. Alt-Azimuths for Beginners.
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
November, 1939. More Amateur Telescopes and Observatories
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
October, 1939. An Amateur 20" Reflector. Pitch Laps for Beginners.
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
September, 1939. An Amateur 30" Reflector
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
August, 1939. Some Applications of the Schmidt Principle in Optical Design
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
July, 1939. Refractors, Astronomy-Inspired Sculpture, a Polarizing Diagonal and Portable Mountings for Beginners
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
June, 1939. Final Figuring of the 200" Mirror. Two Beginner Telescopes.
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
May, 1939. A Polypedalian Telescope, Celestial Photography for Beginners, Gratings.
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
March, 1939. Designing Hershelian Telescopes. Mountings for Beginners.
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
October, 1938. Portable Telescopes, Profiles of Amateur Telescope Making Authors and Contributors
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
September, 1938. A Reflex Euphonium Refractor. Ways to Test for Strain in Glass, Diagonal Mirrors
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
August, 1938. A 2500 Pound Telescope, Schmidts, Marking Mirrors. More Amateur Telescopes.
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
June, 1938. Cassegrainian Spec, RFT Eyepieces, How Much Glass Is Removed While Grinding a Mirror?
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
May, 1938. More Amateur Telescopes
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
April, 1938. More Amateur Telescopes. Dividing Engines, News on 20" Reflectors
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
March, 1938. Domes, a Celestial Globe, Schwartzchild Reflectors, Stabilizing Telescopes with Gyros, Obsidian Mirrors
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
February, 1938. Solar Viewing and Solar Telescopes, Telescoptic Levity.
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
January, 1938. Richest Field Telescopes (RFT)
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
December, 1937. More Amateur Telescopes. Accurate Clock Drives, an "Optical Contact"
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
November, 1937. Domes and Observatories
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
October, 1937. More Amateur Telescopes
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
September, 1937. Barnard Astronomical Society, Elliptical Diagonal Mirrors, Building a Schmidt, More Amateur Telescopes.
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
May, 1937. Working with 20" Mirrors
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
April, 1937. Tribute to W. a. F. Ellison
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
March, 1937. The State of the Hobby. More on the Process of Grinding and Polishing, More Amateur Telescopes, Death of W. a. F. Ellison.
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
February, 1937. More on the 200". 20" Ribbed Glass Disks.
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
January, 1937. A "One Legged" Telescope. Manufacturing Pyrex and Plate Glass. a Drive System with Schematic.
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
December, 1936. Two Woman Telescope Makers, Another Schmidt Camera. a Forthcoming Book.
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
November, 1936. Telescope Making Around the World
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
October, 1936. More Amateur Telescopes, Pitch Testers and an Observatory.
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
September, 1936. More Amateur Telescopes, Polishing Hints.
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
August, 1936. Details of Building the 200". a Project to Observe Jupiter, a Machine for Cutting Setting Circles.
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
July, 1936. A Newtonian Cassegrainian. Optical Tests Discovered or Improved By Amateurs
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
June, 1936. Hempstead Hydrant Mount, "Town Pump" Mount, More on Mirror Making Materials, Helps for Mirror Testing.
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
April, 1936. McMath-Hulbert Observatory, Spectroheliograph
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
March, 1936. Wooden Telescope Tubes. Photomicrographs of Polishing Abrasives and Mirror Surfaces
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
February, 1936. Understanding Mirror Aberrations, Mounts.
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
January, 1936. New Method of Making Pitch Laps, Figuring Mirrors
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
December, 1935. Another Amateur's Observatory, Hints on the Knife-Edge Test, Mirror Figuring Myths
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
November, 1935. Organizing an Astronomy Club
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
October, 1935. A Pitch-Tester
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
September, 1935. More Amateur Telescopes
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
August, 1935. Coatings Mirrors Using the Evaporation Process, Tips for Working with Pitch
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
July, 1935. Unusual Telescope Configurations
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
June, 1935. A Sidereastat Observatory
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
May, 1935. Mounts, Ronchi Test, Miss America Makes a Telescope
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
January, 1935. Telescope Rifle Sights, Conclusion
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
December, 1934. Telescope Rifle Sights
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
November, 1934. Another Gregorian Telescope
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
June, 1934. A Young Telescope Maker, Lining Up Optical Parts
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
May, 1934. A Telescope Maker's Magazine?
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
March, 1934. The Galileo Amateur Observatory, a Lady Telescope Maker
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
February, 1934. Photocell Automatic Guilder
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
January, 1934. More Amateur Telescopes, the State of Telescope Clubs, Tips on Silvering
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
December, 1933. More Amateur Telescopes
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
November, 1933. A Novel Mount-Cum-Observatory, Radius of Zone Measurements, Calculating Focal Lengths
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
October, 1933. The First Amateur Spectroheliograph
Cost:$100+	Difficulty:	Danger 3: (Serious injury possible)	Utility:
September, 1933. More Amateur Telescopes
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
August, 1933. More on Anaplanatic Telescopes
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
July, 1933. Secrets of Ritchey-Chretien (Anaplanatic) Telescopes, Concluded
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
June, 1933. Secrets of Ritchey-Chretien (Anaplanatic) Telescopes
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
May, 1933. Clock Drives and Graduating Setting Circles
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
April, 1933. Portable Telescopes
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
March, 1933. More Amateur Telescopes
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
February, 1933. More Amateur Telescopes
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
January, 1933. 3rd Edition of Amateur Telescope Making and the State of the Hobby
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
December, 1932. Amateur House-Top Dome, Another Method of Silvering
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
November, 1932. 6th Annual Stellafane, a Portable Telescope and a Home-Built Dome
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
October, 1932. Binocular Telescopes Revisited
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
September, 1932. Observatory Structures
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
August, 1932. Amateur-Build Cassegrainians
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
May, 1932. Telescopes Made By Advanced Amateurs
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
March, 1932. Telescope Makers; Very Young, Very Old
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
February, 1932. More on Cassegrainians and Their Construction
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
December, 1931. More Amateur Telescopes
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
November, 1931. Cassegrainians, an Observatory Hutch
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
October, 1931. The Porter Turret Telescope, Sundry Clubs and Groups of Telescope Makers
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
September, 1931. Telescopes Made in Out-of-the-Way Places
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
June, 1931. Telescopes Made By College Professors
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
May, 1931. More Amateur Telescopes
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
April, 1931. A Water-Clock Drive, Silvered Prisms, Sources of Info on Silvering Mirrors
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
March, 1931. More Amateur Telescopes
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
February, 1931. A Binocular Telescope
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
December, 1930. 12 Inch Cassegrainians, Spectrohelioscopes
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
November, 1930. More Amateur Telescopes
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
October, 1930. 5th Annual Stellafane, the Porter Turret Telescope
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
September, 1930. Domes and Other Housings
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
August, 1930. Inexpensive Homemade Telescopes
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
July, 1930. More Amateur Telescopes, Spectrohelioscopes
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
June, 1930. More Amateur Telescopes, a Note on Amateur Astronomer Clyde Tombaugh
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
May, 1930. Skeletal Vs. Tube Reflector Housings
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
April, 1930. More Amateur Telescopes
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
March, 1930. Amateur Refracting Telescopes
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
February, 1930. Atmosphere, Telescope and Observer Concluded
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
January, 1930. Young Telescope Makers, "Atmosphere, Telescope and Observer"
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
December, 1929. Merits of Different Apertures
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
November, 1929. More Amateur Scopes, Spectroscope
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
October, 1929. More Amateur Telescopes, 4th Annual Stellafane.
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
September, 1929. More Amateur Telescopes, Profile of W. a. F. Ellison
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
August, 1929. More Amateur Telescopes, Microscopy.
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
June, 1929. More Amateur Telescopes and Mounts.
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
May, 1929. Building Observatories
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
April, 1929. Amateur Telescope Mounts
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
March, 1929. Two Telescopes Made By Clergymen. an Invitation to Women Telescope Makers.
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
February, 1929. More Amateurs Share Their Telescopes
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
January, 1929. Spectroscopes, a Home-Made Clock Drive
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
December, 1928. Solar Spectroscopes, Photographing the Moon.
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
November, 1928. Telescopes Based on 2nd Edition of Amateur Telescope Making
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
October, 1928. More Amateurs Share How the Built Their Telescopes
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
September, 1928. Report of the "Stellafane" Amateur Astronomy Gathering
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
August, 1928. Homemade Telescope Mountings
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
July, 1928. Three More Homemade Telescopes
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
May, 1928. Growing Hobby of Amateur Telescope Making, with Some Examples
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility: