402 



CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 



Nos. 10408-10. 



Showing the De Khotinsky Aquarium Type Thermostat Bath, set up complete, ready for operation. 

 This Thermostat is being used in the Physical Chemistry Laboratories of the University of Chicago 

 and other leading universities -with entire satisfaction. The illustration shows the large amount of 

 space available for use and the unobstructed illumination from all sides. 



