THE RAPIDLY INCREASING POPULARITY OF 
SPENCER 
MICROSCOPES 
Is but the natural 
result of 
OPTICAL SUPERIORITY 
[ECHANICAL PERFECTION 
and the embodiment of many 
Improvements which mark 
them as being adapted best of 
all to their purpose. 
We Lead in these Improvements 
Spencer=Lens Co 
BUFFALO, N. Y. 
Our New No. 36 H. 
Buchei Engtaving Co. 
Process and Wood Engraving, Electro- 
typers and Manufacturers of Stereotyping 
and Engraving Machinery. 5» 3v 3» 5» \ 
80 % North High Street , COLUMBUS , OHIO. 
DIE STAMPING. PLATE AND LETTER PRESS PRINTING. 
SPAH% & GLENN, 
PRINTERS and PUBLISHERS. 
50 EAST BROAD STREET. COLUMBUS, OHIO. 
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