iv PREFACE. 



endeavored to give such scientific information related to it 

 as may be of interest and value. 



The scientific knowledge has been acquired from time to 

 time through work done by various investigators at the different 

 Experiment Stations. To all of these men who have searched 

 for and discovered facts bearing upon dairying the authors 

 wish to express their thanks and acknowledgment. 



It may be added that the statistics and tables given in this 

 work have been quoted from noted, reliable authorities, as 

 indicated. 



The authors are also indebted to the following parties for 

 the use of electrotypes: Mower-Harwood Co., and Cherry 

 Bros., Cedar Rapids, la.; Creamery Package Co., Waterloo 

 Cream Separator Co., and Iowa Separator Co., Waterloo, la.; 

 Vermont Farm Machine Co., Bellows Falls, Vt. ; Jensen Mfg. 

 Co., Topeka, Kans.; Ox Fiber Brush Co., Davis Cream Sep- 

 arator Co., Borden & Selleck Co., and De Laval Separator 

 Co., Chicago, 111.; Wagner Glass Works, and J. H. Monrad, 

 New York, N. Y.; Burrell & Co., Little Falls, N. Y.; Empire 

 Cream Separator Co., Bloomfield. N. J.; Dairy Queen Mfg. 

 Co., Flora, Ind.; Dairy Record, St. Paul, Minn., and W. D. 

 Hoard, Fort Atkinson, Wis. 



G. L. McKAY. 

 C. LARSEN. 



