Sterilising. 77 



longer when cooled with ice. This testing should be 

 carried through most strenuously if one would avoid 

 disagreeable surprises and serious losses. 



We leave this subject, referring all those merely in- 



Fig. 9— WORKING PARTS OF THERMOSTAT. 



terested in sterilization of milk to the treatise written 

 by Mourad on "Pasteurization and Milk Preservation," 

 where a synopsis of such apparatus is given, and to 

 the article by E. A. de Schweinitz in the year book 

 of the U. S. Department of Agriculture for 1<S!')4. 



