Amateur Scientist on CD-Rom (M2071, $29.50) with the Wollensak Optical Drawings (W1005, $49.00). Bundle them together and save $10 From the archives of Scientific American Magazine, more than 72 years of experiments and projects from all The Amateur Astronomer, The Amateur Telescope Maker, and The Amateur Scientist columns from the beginning in 1928 thru 2001. Every article is complete with all photos, sketches, etc. More than 1,000 projects in every major field of science. We scanned over 600 original Wollensak Optical drawings into this CD. Includes Velostigmat and Raptar lenses, Telephotos, Projection lenses, Mirrotel Optical assemblies, Catadioptric Systems, Enlarging lenses, Condenser systems, Microprojection lenses, Collimator assemblies, Velostigmat lenses, Sighting scopes, Vari-Power telescopes, Relay lens assemblies, Binocular Optical system etc, etc. All are in .pdf format and can be printed. Works on Windows.