viii Preface 
too much to hope that every conclusion will stand 
the test of further investigation and experience. 
Dairy practice in the United States owes much 
to the investigations of the Agricultural Experiment 
Stations. Of the results of their labor free use 
has been made in various ways, and in many cases 
without specific mention at the particular place. 
Without wishing to make distinctions, particular 
acknowledgment is here rendered to the reports 
and bulletins of the Stations in Maine, New Hamp- 
shire, Vermont, Connecticut (Storrs), Canada, New 
York (State), New York (Cornell), New Jersey, 
Pennsylvania, Illinois, Iowa, Wisconsin and Minne- 
sota. For those who wish to make more extended 
investigations, a bibliography is added in the Ap- 
pendix, giving references to many bulletins. 
Thanks are due to D. H. Burrell & Co., the 
Vermont Farm Machine Co., the DeLaval Separator 
Co., the Star Milk Cooler Co., the Champion Milk 
Cooler Co., J. F. Hodgkin, and F. B. Fargo & Co., 
for the use of electrotypes. 
Acknowledgment is also due my _ colleagues, 
Messrs. Cavanaugh, Durand, Hall and VanWagenen, 
for valuable assistance, and to Professor L. H. 
Bailey for much friendly counsel and many useful 
suggestions. 
HENRY H. WING. 
OorNELL University Dalsy, 
January 1897. 
