PREFACE VU 



tion, but will show where increases or decreases come about, 

 the effect of increase in the price of labor on final cost, or 

 perhaps where costs may be reduced in one item or another. 

 The author wishes to acknowledge the helpful advice and 

 criticism of Professor O. S. Morgan. He also is grateful to 

 Helmer Rabild for data on the ages of cows. 



CARL W. LARSON. 

 New York City 

 Match, 1916. 



