One of the many advantageous features of the 



SPENCER BINOCULAR 



DISSECTING MICROSCOPE 



No. 54 



appeals especially to the entomologist. It 

 is this: 



Sufficient range of adjustment by rack 

 and pinion to bring the objectives to a 

 focus considerably above the plane of the 

 stage. 



This permits you to examine an insect mounted 

 on a sheet of cork without disturbing the mount 

 in the least. Put it on the stage and focus. 

 Try it with anj' other Binocular microscope. 

 There are other advantages, well worthy of 

 consideration. They will merit your orders 

 if you want the best. 



Catalogue sent on request. 



Spencer Lens Compe^ny 



BUFFALO, N. Y. 



SPENCER BINOCULAR MICROSCOPE NO. 54A 

 with extra stand, one pair of objectives 

 and oculars in Cabinet, 



$60.00. Discount to schools. 



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 sohcit 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 Ust. 



If interested in other branches of natural history write for our 

 Circular E-lOO, hsting our numerous price hsts. 



Founded 1862 



Incorporated 1890 



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



