Ready References
A Guide to Backyard Astronomy
Binoculars: Halfway to a Telescope
Choosing Binoculars for Astronomy
Celebrated Variable Stars
Control Instrument Applications
Optical Instruments
Notes on the Construction and Design of Instruments and Apparatus
Ready References Binoculars: Halfway to a Telescope Choosing Binoculars for Astronomy 
Control Instrument Applications 
Notes on the Construction and Design of Instruments and Apparatus 