PREFACE TO SECOND EDITION 



In presenting this revised edition of Productive Swine 

 Husbandry to the public, the author wishes to express his ap- 

 preciation of the reception accorded the first edition, for which 

 the demand has exceeded expectations. 



In the revision, new material has been added for the purpose 

 of widening the scope of the book and making the text more gen- 

 erally applicable to all latitudes. Certain faults of the origi- 

 nal book have been corrected, and important , additions have 

 been made to the illustrations. In short, an effort has been made 

 to bring the book up to date, and to make it a suitable text- 

 book for agricultural students as well as a convenient and valu- 

 able reference book for the busy farmer. 



The author wishes to gratefully acknowledge the assistance 

 rendered him by Professor K. C. Davis, the editor of the book, 

 and also by Professor C. L. Willoughby of the University of 

 Florida, who has furnished many pertinent suggestions in con- 

 nection with the revision. 



Geoege E. Day. 



Ontario Agricultural College, 

 Guelph, Ontario, Canada. 



