LABORATORY WORKERS APPRECIATE 



SPENCER MICROSCOPES 



Our New No. 45 



Grasp it with the 

 ivhole liand 



Special booklet ready 



BECAUSE 



I. They represent the best optics and 

 stands of the latest types of design. 



II. They stand the rough and tumble of 

 laboratory use. 



III. There 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 



SVENCER LENS COMPANY 



BUFFALO, N. Y. 



Bucket Engtaving Co. 



Process and Wood Engraving, Electro- 

 typers and Manufacturers of Stereotyping 

 and Engraving Machinery. a» & Sa a. 3w 



80y2 North High Street, 



COLUMBUS, OHIO. 



DIE STAMPING. 



PLATE AND LETTER PRESS PRINTING. 



SPAHIj & GLENN, 



PRINTERS AND PUBLISHERS. 



50 EAST BROAD STREET. 



COLUMBUS, OHIO. 



Wben writing to advertisers, please mention the " Ohio Natnralist.' 



