SPENCER MICROSCOPES 



ARE BUILT FROM THE 



LABORATORY WORKER'S STANDPOINT 



There are incorporated in them many features of 

 practical iisabiHty, features which miike for convenience 

 and comfort in use as well as efficiency and durability 

 and which mark them as best adapted to their purpose. 



SPENCER MICROSCOPES 



EXCEL IN 

 I. OPTICAL SUPERIORITY. 

 II. MECHANICAL PERFECTION. 

 III. EMBODIMENT OF IMPROVEMENTS 

 WHICH MARK THEM AS BEST 

 ADAPTED TO THEIR PURPOSE. 



Nn ftft R Equippod with 16m/m 

 11 U» 00 D aiul 4m/m objectives. 

 Double nosppiece. 

 One eyepiece. 

 Iris diaphragm. 

 Complete in Cabinet, $01 CA 

 Discount to schools. >J>Jl»Jv 



SPENCER OPTICS 



HAVE STOOD UNSURPASSED 

 FOR OVER HALF A CENTURY 



GET OUR QUOTATIONS 



SPENCER LENS CO. 



BUFFALO. N. Y. 



Ward's Natural Science Establishment 



84-102 COLLEGE AVE., ROCHESTER, N. Y. 



Having recently purchased the entire stock of the American Ento- 

 mological Co., of Brooklyn, we are now prepared to furnish Entomo- 

 logical Specimens and Supplies of all kinds. 



We believe our stock to be the largest in this country, if not in 

 the world, and we solicit your patronage. 



Our prices are made as low as is possible, considering the quality 

 of the material furnished. 



We manufacture the only genuine Schmitt Boxes and the Amer- 

 ican Entomological Co. Insect Pins. 



We shall prepare from time to time special lists of choice material, 

 and will mail these free to those whose names are on our mailing list. 



If interested in other branches of natural history write for our 

 Circular E-lOO, Usting our numerous price lists. 



Founded 1862 



Incorporated 1890 



Please mention the Journal of Economic Entomology when writing to advertisers. 



