0 8d BE ao YO 
Microscopes and accessories. 
Microscopic Objectives, oth Achromatic and Apochro- 
matte, 
Microphotographic Apparatus, for visible and ultra- 
violet light. 
Arrangement for viewing Ultra-Mcroscopic Particles. 
Projecting Lanterns, the Episcope and Epidiascope. 
Binocular and Monocular Telescopes. 
Astronomical and Astrophotographic Objectibes. 
Field Glasses and Stereoscopic Telescopes. 
Stereoscopic Range Finders. 
Photographic Lenses (Protar, Planar, Unar, and Tessar); 
Reversing Prisms, Focusing Lenses, etc. 
Palmos Cameras with focal plane shutters. 
Stereoscopes and Uerants for viewing photographs. 
Telescopic Gun Sights. 
Optical Measuring Instruments for Chemists and Phys- 
icists, including Spectroscopes, Spectrometers, Re- 
fractometers, Comparators, Stereo-Comparators, 
Interference and Schlieren Apparatus, etc. 
Catalogues and circulars describing any of the above ecider genus together with 
quotations of prices, either duty paid or duty free, sent on reques 
THE SCIENTIFIC SHOP 
ALBERT B. PORTER 
Scientific Instraments 326 Dearborn St., Chicago 
