LABORATORY WORKERS APPRECIATE 



SPENCER MICROSCOPES 



Our New Nb. 45 



Grasp it with the 

 whole hand 



Special booklet ready 



BECAUSE 



I. The}' represent the best optics and 

 stands of the latest types of design. 



II. They stand the rough and tumble of 

 laboratory use. 



III. TherS'are incorporated in them more 



features of practical usability and 

 features which make for conven- 

 ience, comfort and. durability. 



IV. They are designed and built under the 



direction of men who have had 

 many years of practical laboratory 

 experience as well as experience in 

 manufacture, men who understand 

 and are in sympathy with the needs 

 of laboratory workers. 



SPENCER OPTICS 



HAVE STOOD UNSURPASSED FOR 



OVER HALF A CENTURY 



SPENCER LENS COMPANY 



BUFFALO, N. Y. 



Buchet Engtaving Go. 



Process and Wood Engraving, Electro- 

 typers and Manufacturers of Stereotyping 

 and Engraving Machinery. I*. X ^ i^ ^ 



80/2 North High Street, 



COLUMBUS, OHIO. 



DIE STAMPING. 



PLATE AND ^LETTER PRESS PRINTING. 



SPAH% & GLENN, 



PRINTERS AND PUBLISHERS, 



50 EAST BROAD STREET. 



COLUMBUS, OHIO. 



Wben writing to advertiaers, please mention the " Ohio Naturalist." 



