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. 
Gzorce E. Day. 
Ontario AGRICULTURAL COLLEGE, 
Guelph, Ontario, Canada. 
