^he; MickoscopicAi, advertises.. 



Zeiss Microscopes. 



THE ciieL \m mm mm in jeni 



These works have no rival in the manufacture of stands and objectives. Their n w 

 Catalogue of 1891 contains all the latest improvements in Miceoscopic and Photo-Micho- 

 GRAPHic Appaeatt^s. As Agent I am enabled to import all their apparatus at the very 

 lowest rates. Orders for Colleges and Institutions filled promptly, dutj' free. Just out : 

 Carl Zeiss' Catalogue of Optical Measueing Insteuments. 



Six new series of Photograiihic Lenses, called the Zeiss Anastigmats (U. S. Paten' 

 No. 435,271;, are the newest production of the Carl Zeiss firm. Their superiority over all 

 others is everywhere recognized in Europe. 



Catalogues forwarded on application. 



F. J. EMMERICH, Sr., Agent, 



74 Murray St., New York, N. V. 



JOSEPH ZES^TMAYER. 



209 South 11th Street, - PHILADELPHIA. 



STUDENTS' MICROSCOPES, $38 to $46, 

 COMPLETE. 



ILLUSTRATED CATALOGUE ON APPLICATION. 



Incorporatrcl 1893. 



Spencer 8c Smith Optical Company, 



367-373 Seventh Street, 

 Buffalo, N. Y., U. S. A. 



MANlIFA^'Tl'KEKS OF 



High-Gracle Microscopes, Telescopes, and 

 Accessories. 



PROMPT ATTIRNTION GIVEN \J,l, ORDERS. 



S;ud lo: oui- iiuvv c.ilaKiLjue, ju•^t out, giving full descriptions and price lists. 



