^»3£: 



Demonstration Osmoscope 



This instrument, designed by Prof. Ganong, is so constructed 

 as to exhibit csmotic absorption in visible progress before the 

 eyes of an on-looking class. It is particularly characterized by 

 its rapidity of operation, convenience of manipulation and con- 

 stant readiness for immediate use. The illustration is one-sixth 

 size of the original. Coirplete, $4.25. 



One of the new pieces of apparatus described in our new 

 Ganong Apparatus Catalog which will be sent free on request 



Bausch ^ Ipmb Optical (g. 



NEW YORK WASHINGTON CHICAGO SAN FRANCISCO 



LONDON rioCHESTEIl. N.Y. ^I^ANKFORT 



