Journal of Entomology and Zoology — Advertising Section 



The Journal of 

 Zoological Research 



Edited by 

 WALTER E. CO LUNGE, M. Sc, F. L. S., F. E. S. 



The Galty Mdrine Laboratory 

 The University, St. Andrexcs, Scotland 



The subject matter is strictly confined to original zoological 



research — systematic and anatomical. Fully illustrated by 



lithographic plates and text figures. 



Each volume will consist of 4 parts, price $5. 



All subscriptions should be forwarded to 



Messrs. Dulau & Co., Ltd. 



37 Soho Square, London, W., England 



It does away 

 with the old 

 Cumbersome 

 Lantern-sHde 

 Holder 



A relic of a 

 Quarter Century 

 Ago 



Spencer Deuneascope 



For Protection of Lantern Slides 



Has incorporated in it the SPP^NC^ER TRANSPOSER, a patented 

 mechanical means for handling the slides, which, in addition to putting 

 a ban on the old cumbersome and troublesome slide holder, gives a 

 dissolving effect which is accomplished with but one outfit only (not two). 

 This feature has been pronounced the only real stereoi)ticon advance in 2,5 years. 

 Its nitrogen filled Mazda Lamp also adds to its convenience and efficiency. 



Citlalog free on request. 



SPENCER LENS COMPANY, Buffalo, N. Y. 



Makers of Superior MICROSCOPES (end MICROTOMES 



