Complete with measuring and reservoir cylinders and rubber tubing. 



List price, $6.75 



RESPIROMETER 



designed by Professor Ganong to exhibit and to measure the gas exchanges in typical 

 respiring material (e.g., germinating seeds), and to accomplish this with considerable 

 accuracy and convenience of manipulation. 



We shall be pleased to send descriptive catalog of Ganong Apparatus on request. 



Bausch ^ Ipmb Optical (g. 



NEW YOIiK WASHINGTON CHICAGO SAN FIIANCISCO 

 LONDON liOCHCSTEn, N.Y. fRANKrORT 



