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Demonstration Osmoscope 



This instrument, designed by Professor Ganong, is so con- 

 structed as to exhibit osmotic 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 constant readiness, for immediate use. 

 Complete as illustrated, $4.25. 



One of the pieces of apparatus described in our Ganong 

 Apparatus Catalog which will be sent free on request 



Bausch i^ Ipmb Optical (o. 



NEW YORK 



WASHINGTON 



CHICAG O 



SAN FRANCISCO 



LONDON riOCHESTEn,N.Y. ^J^ANKFORT 



