and depriving them of much of the Hght of advanced science to 

 which they are justly entitled and which they need for their greatest 

 development for the lasting benefit of the producer, manufacturer 

 and consumer alike. 



O. F. HunzikBR. 



Purdue University, March, 1914. 



PREFACE FOR SECOND EDITION 



Since the issuance of the First Edition of this treatise many 

 changes have taken place in the various phases of the Condensed 

 Milk Industry. Old processes have been modified and improved, 

 new processes have been invented, the equipment used for manu- 

 facture has undergone changes, new tests have been devised for the 

 determination of the composition of the finished products and the 

 entire status of the industry has yielded to an unexpected, unfore- 

 seen and important evolution. 



Of the most outstanding new features in this edition may be 

 mentioned the chapters on the Continuous Concentrator, the Stand- 

 ardization of Condensed Milk and Milk Powder, Malted Milk, the 

 Mojonnier Test, Bacteriological Analyses. Important additions 

 have also been made to the chapters on History of the Industry, 

 Volume of Output, Markets, Exports, Imports, Cost of Manufac- 

 ture and the various processes of manufacture of Condensed Milk, 

 Condensed Buttermilk and Milk Powder. 



In preparing the Second Edition, the author has endeavored 

 to completely revise the old edition, incorporating in the revised 

 edition the many changes which the tooth of time has wrought and 

 to bring this treatise in all its important phases up-to-date. 



O. F. HuNZIKER. 



Chicago, 111., July, 1918. 



