SARL Ziiga 
Microscopes and accessories. 
Microscopic Objectives, both Achromatic and Apochro- 
matic, 
Mtcrophotographic Apparatus, for visible and ultra- 
violet light. 
Arrangement for viewing Ultra-Microscopic Particles. 
Pr ojecting Lanterns, the Epzscope and Epidiascope. 
Binocular and Monocular Telescopes. 
Astronomical and Astrophotographic Objectives. 
Feld Glasses and Stereoscopic Telescopes. 
Stereoscopic Range Finders. 
Photogr aphic Lenses, (Protar, Planar, Unar, and Tessar); 
Reversing Prisms, Focusing Lenses, ete: 
Palmos Cameras with focal plane shutters. 
Stereoscopes and “Oerants 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. 
s, together with 
Cc : : 
atalogues and circulars describing any of the above instrument 
Wotations of prices, either duty paid or duty free, sent on request. 
THE SCIENTIFIC SHOP 
ALBERT B. PORTER 
326 Dearborn St., Chicago 
‘entific Instraments 
