6tb:l^ 



SCIENCE 



Miw SxBiia 



VOL. XXXVI. No. 916 



Friday, July 19, 1912 



SlNSLI COFIBB, 16 CTS. 



Annual Scbsckiption.JS.W 



Barnstead Automatic Water Stills 



The most popular for laboratory purposes, and considered by many eminent 

 chemists to be by far the most efficient on the market. 



The product of these apparatus represents the highest degree of purity ever 

 reached by any process of distillation. 



The operation when once begun is thoroughly effective, automatic and con- 

 tinuous ; removes ammonia and all gaseous and organic impurities, and renders 

 water chemically pure. 



QAS HEATED, sizes from \ to 10 gallons per hour 



STEAM HEATED, sizes from 5 to 75 gallons per hour 



The steam operated stills are considerably used for furnishing pure water, both 

 for laboratory and drinking purposes; for the latter the stills can be equipped with 

 a special arrangement for making the water thoroughly palatable. 



WTite to-day for descriptive booklet " Water Distilling Apparatus" 



EIMER & AMEND (Established 1851) NEW YORK 

 Headquaeters fob Educational Laboratory Supplies 



