1959
 

December, 1959. About Experiments That Demonstrate the Function of the Thyroid Gland
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	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:
September, 1959. An Amateur's Controlled Experiments Measure the Effects of a Tranquilizing Drugs on Rats
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:
July, 1959. How to Keep Various Reptiles Healthy and Happy in the Home
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
June, 1959. How to Fit a Diffusion Cloud-Chamber with a Magnet and Other Accessories
Cost:$0-100	Difficulty:	Danger 3: (Serious injury possible)	Utility:
May, 1959. How to Recreate the Apparatus with Which the Charge of the Electron Was Measured
Cost:$100+	Difficulty:	Danger 4: (POSSIBLY LETHAL!!)	Utility:
April, 1959. How Amateurs Can Build a Simple Magnetic-Resonance Spectrometer
Cost:$100+	Difficulty:	Danger 3: (Serious injury possible)	Utility:
March, 1959. How Short Term Weather Forecasts Were Made on the Basis of Electrical Effects
Cost:$0-100	Difficulty:	Danger 2: (Minor injury possible)	Utility:
February, 1959. Mostly about Unearthing the Fossils of Dinosaurs
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
January, 1959. How to Make an Electrostatic Machine to Accelerate Both Electrons and Protons
Cost:$100+	Difficulty:	Danger 3: (Serious injury possible)	Utility:

1958
 

December, 1958. On Experiments with Gibberellic Acid Which Stimulates the Growth of Plants
Cost:$0-100	Difficulty:	Danger 3: (Serious injury possible)	Utility:
November, 1958. About a Remarkably Simple Device to Attain Low Temperatures and Various Other Matter
Cost:$0-100	Difficulty:	Danger 3: (Serious injury possible)	Utility:
October, 1958. Mostly about Ingenious Ways of Studying Artificial Satellites
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
September, 1958. How a Group of High School Students Constructed a Beta-Ray Spectrometer
Cost:$100+	Difficulty:	Danger 3: (Serious injury possible)	Utility:
August, 1958. An Excursion into the Problem of Measuring Irregular Areas
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
July, 1958. How a Kansas Amateur Group Counts Meteors By Reflection of Radio Waves
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
June, 1958. How to Make a Pendulum That Will Demonstrate the Rotation of the Earth
Cost:$0-100	Difficulty:	Danger 2: (Minor injury possible)	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:
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:
March, 1958. How to Cultivate Harmless Bacteria and Perform Experiments with Them
Cost:$0-100	Difficulty:	Danger 3: (Serious injury possible)	Utility:
February, 1958. How a Gas-Discharge Tube Was Made and Applied in Diverting Experiments
Cost:$100+	Difficulty:	Danger 4: (POSSIBLY LETHAL!!)	Utility:
January, 1958. Mostly about How to Study Artificial Satellites Without Complex Equipment
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:

1957
 

December, 1957. The Strange Story of Robert Stroud, Who Studied Birds While in Solitary Confinement
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
November, 1957. How to Make Extremely Energetic Sparks for High-Speed Photography and Other Purposes
Cost:$100+	Difficulty:	Danger 4: (POSSIBLY LETHAL!!)	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:
September, 1957. How to Make an Extremely Accurate Clock Based on the Vibration of a Quartz Crystal
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
August, 1957. An Apparatus to Study the Metabolism of Mice, and Experiments with the Eye
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
July, 1957. Concerning Simple and Ingenious Devices to Record the Waves Made By Earthquakes
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
June, 1957. About the Activities and the Trials of Amateur Rocket Experimenters
Cost:$100+	Difficulty:	Danger 4: (POSSIBLY LETHAL!!)	Utility:
May, 1957. Experiments Which Show That the Earth Functions As an Electrostatic Machine
Cost:$0-100	Difficulty:	Danger 2: (Minor injury possible)	Utility:
April, 1957. On Testing Boat Designs Without a Towing Tank, and Skipping Stones on the Beach
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
March, 1957. Wherein a Gifted Naturalist and High-Speed Photographer Experiments with Hummingbirds
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
February, 1957. How a Young Amateur Mastered the Carbon 14 Dating Method of Dating Ancient Organic Materials
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:

1956
 

December, 1956. A Computer to Solve a Problem of Mechanical Translation and an Ingenious Cloud Chambers
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
November, 1956. A Homemade Interferometer: the Instrument That Can Be Used to Measure a Light Wave
Cost:$100+	Difficulty:	Danger 2: (Minor injury possible)	Utility:
October, 1956. Fossil Starfish From Iowa and a British Van De Graaf
Cost:$0-100	Difficulty:	Danger 2: (Minor injury possible)	Utility:
September, 1956. About a Diffraction Grating Spectrograph Made of Materials Costing Under $100
Cost:$0-100	Difficulty:	Danger 2: (Minor injury possible)	Utility:
August, 1956. Concerning the Professional Study of an Amateur Sport: Sailing Boats
Cost:NA	Difficulty:	Danger 1: (No hazards)	Utility:
July, 1956. Concerning an Inexpensive and Safe Method for the Generation of X-Rays
Cost:$100+	Difficulty:	Danger 3: (Serious injury possible)	Utility:
June, 1956. Concerning the Problem of Making Sharper Photographs of the Planets
Cost:$100+	Difficulty:	Danger 2: (Minor injury possible)	Utility:
May, 1956. Mostly about the Collection and Study of Fossilized Seeds
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
April, 1956. More about Making a Cloud Chamber to Reveal the Paths of Nuclear Particles
Cost:$0-100	Difficulty:	Danger 2: (Minor injury possible)	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:
February, 1956. Mostly about the Investigation of Electrical Discharges Without Expensive Vacuum Pumps
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
January, 1956. About Experiments with Sound for the High-Fidelity Enthusiast
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:

1955
 

December, 1955. About the Preparation of Microscope Slides, the Testing of Telescopes and Other Matters
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:
October, 1955. Some Simple Apparatus for Studying the Dynamics Airflow and Waterflow
Cost:$0-100	Difficulty:	Danger 2: (Minor injury possible)	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:
August, 1955. Concerning an Electrophoresis Apparatus to Separate the Components of a Mixture
Cost:$0-100	Difficulty:	Danger 2: (Minor injury possible)	Utility:
July, 1955. Concerning Microscope Illumination and an Unusually Steady Telescope Mounting
Cost:$0-100	Difficulty:	Danger 2: (Minor injury possible)	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:
May, 1955. How to Make an Aerodynamic Smoke Tunnel and More about the Puzzle of the 12 Balls
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
April, 1955. About Historic and Modern Machines for the Generation of Static Electricity
Cost:$0-100	Difficulty:	Danger 4: (POSSIBLY LETHAL!!)	Utility:
March, 1955. About Little Computers That Solve Puzzles and an Experiment on the "Gyroscopic Eye"
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
February, 1955. About Tiny Mineral Specimens and Other Matters, Including a Troublesome Puzzle
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:

1954
 

December, 1954. About Cultivating Algae From the Soil and Making Steady Telescope Mountings
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
November, 1954. About the Eye of the Snake and, By Curious Coincidence, a Telescope Like a Gigantic Eye
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
October, 1954. On the Collecting of Moths and Butterflies, and Some Ingenious and Attractive Sundials
Cost:$0-100	Difficulty:	Danger 2: (Minor injury possible)	Utility:
September, 1954. Largely about an Artist's Earnest Attempt to Depict the Particles of Modern Physics
Cost:NA	Difficulty: NA	Danger 0: (NA)	Utility:
August, 1954. About Various Things, Mainly an Instrument for the Very Precise Measurement of Length
Cost:$0-100	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:
June, 1954. About Making a Microscope, a New Idea for a Large Telescope and Other Matters
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
May, 1954. About a Hygrometer Made From a Flower Pot, and Huge Telescopes with Compound Mirrors
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:
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:
February, 1954. Two Astronomical Matters: Electronic Light Meters and "Off-Axis" Reflecting Telescopes
Cost:$100+	Difficulty:	Danger 2: (Minor injury possible)	Utility:
January, 1954. About the Pleasures of Paleontology and How to Make a "Fish Eye" Camera
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:

1953
 

December, 1953. Two Optical Matters: the Making of a "Fish Eye" Camera and the Buying of a Microscope
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:
October, 1953. On the Nationwide Net of Weather Observers and the Ruling of a Grating on a Cylinder
Cost:$100+	Difficulty:	Danger 1: (No hazards)	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:
August, 1953. On the Popular Diversion of Free Diving, and a Well-Built Cassegrain Telescope
Cost:$100+	Difficulty:	Danger 4: (POSSIBLY LETHAL!!)	Utility:
July, 1953. The Archaeology of New York City, and Some Incidental Information on Palomar Mountain
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
June, 1953. About an Ingenious Electronic Seismograph and the Observation of Changes on the Moon
Cost:$100+	Difficulty:	Danger 2: (Minor injury possible)	Utility:
May, 1953. About the Making of Simple Mathematical Machines and the Observation of Jupiter
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
April, 1953. About a Small Wind Tunnel, Cloud Chambers and "Primitive" Techniques of Measurements
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
March, 1953. On Scintillation Counters and How a Group of Amateurs Helped to Build a Planetarium
Cost:$100+	Difficulty:	Danger 3: (Serious injury possible)	Utility:
February, 1953. About a Portable Terrestrial Telescope and the Enjoyment Chromatography
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
January, 1953. On the Fascination of Microscopy and Some Curious Amateur Observations of the Moon
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:

1952
 

December, 1952. On Mouse Genetics and a Variety of Things of Interest to the Avocational Astronomer
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
November, 1952. The Study of Rocks and the Making of Two Relatively Simple Telescopes
Cost:$0-100	Difficulty:	Danger 3: (Serious injury possible)	Utility:
October, 1952. On the Culture of Plants Without Soil, and the Behavior of the Telescope-Maker's Pitch
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
September, 1952. About Home-Made Cloud Chambers and the Fine Telescope of a Portuguese Navy Officer
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
August, 1952. Concerning (1) the Life of the May Fly; (2) the Spectra of Diffraction Gratings
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
July, 1952. The Pleasures and Pitfalls of Archaeology, and More on the Making of Ruling Engines
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
June, 1952. Mountain Geology and an Amateur Contribution to a New Ruling Engine
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
May, 1952. About the Banding of Birds and the Cooperative Building of a Telescope
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
April, 1952. Larkin's Sprengnether Seismometer
Cost:$100+	Difficulty:	Danger 1: (No hazards)	Utility:
March, 1952. Determining Latitude/Focogram
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:

1951
 

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, 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:

1950
 

December, 1950. Schlesman Telescope
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:
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:
August, 1950. Focograms
Cost:$0-100	Difficulty:	Danger 1: (No hazards)	Utility:
July, 1950. A Portable Springfield Variant Mount
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:
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: