PREFACE 



In the study of any science the student should, 

 so far as possible, work out his own problems. Yet 

 the beginner may be saved much useless time and 

 labor by helpful suggestions at the proper time. 

 This Manual is designed as a guide to students in 

 dairy laboratory work, with just enough explana- 

 tion given to supplement the exercises which are 

 outlined in the Manual. It is not intended for a 

 text book and should not be used in the place of 

 one. 



The author's thanks are due Prof. W. A. Stock- 

 ing, Jr., for many helpful suggestions in the ar- 

 rangement and preparation of this book. 



The author recognizes that a book of this kind 

 needs frequent revision, and an effort will be made 

 to keep this Manual up to date. 



H. E. Ross. 

 Dairy Laboratories, 

 New York State College of Agriculture, 

 at Cornell i 'niversiiy. 



August SI, 1910 



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