industries since their beginning, curtailing their development and 
depriving them of much of the light of advanced science to which 
they are justly entitled and which they need for their greatest devel- 
opment for the lasting benefit of the producer, manufacturer and 
consumer alike. 
O. F. Hunziker. 
Purdue University, March, 1914. 
PREFACE’FOR THIRD EDITION 
Since the issuance of the First and Second Editions 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 manufacture has undergone changes, new tests have been de- 
. vised for the determination of the composition of the finished prod- 
ucts and the entire status of the industry has yielded to an unex- 
pected, unforeseen and important evolution. 
Of the most outstanding new features in this edition may 
be mentioned the chapters on Directions for the Standardization of 
the Sterilizing Process, Kvaporated Milk Control, Use of the Mojon- 
nier Viscosimeter, Manufacture of Condensed Buttermilk and But-. 
termille Powder, New Patents and Processes for the Manufacture of 
Milk Powders. Important additions have also been made to the 
chapters on History of the Industry, Volume of Output, Markets, 
Exports, Imports, Cost of Manufacture, Standardization of Con- 
densed Milk, and Prevention of Condensed Milk and Milk Powder 
Defects. 
In preparing this Edition, the author has endeavored to com- 
pletely revise the old edition, incorpoarting 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, HL, September, 1920. 
