iv Preface. 



Finally, the Appendix Tables, giving the composition and fertil- 

 izing value of the various feeding stuffs, a marked feature of the 

 old work, have been extended and brought down to date. 



Those familiar with the earlier editions may observe that some of 

 the experiments reported and other matter given in the old book 

 have been supplanted by later and better material. The reader who 

 notes that much is still lacking in this book is reminded that the sub- 

 ject of animal nutrition and the rational feeding of animals is one of 

 great complexity, and that it is only about seventy years since trained 

 men began to search out and put into form the matter here reported. 



Thruout the book the object has been to present the findings of 

 the laboratory, the feed lot, and the stable bearing on the problems 

 of stock feeding in simple language and few words. The scientific 

 terms necessarily used have been plainly defined, and thru constant 

 repetition should almost unconsciously become a part of the vocab- 

 ulary of all who use the book. The observant reader will discern 

 that the results of the investigations as set forth in this work do not 

 tend to render the great art of stock feeding complex and abstruse, 

 but rather to greatly simplify it. In evidence of this, note the smaller 

 allowances of expensive concentrates recommended in the rations 

 for dairy cows and for fattening cattle when corn silage and the 

 legume forages are rightly used to supply the roughage; also that 

 grinding and cooking feed is, for the most part, discouraged, in 

 opposition to the theories and teachings of earlier times. Those who 

 may be rather surprised that the ways marked out in this book are 

 after all so simple and plain should remember that knowledge and 

 wisdom are always kind in leading us along easy paths. 



"While the number of pages in the new F&eds and Feeding is some- 

 what less than before, the total matter contained has been materially 

 increased thru enlarging the printed page, changing the style of type, 

 simplifying the tables, avoiding repetitions, etc. 



Acknowledgment is due my co-workers, Professors Woll, Hart, and 

 McCollum, for appreciated assistance on Part I; to Messrs. A. D. 

 Faville, 0. Lloyd-Jones, and E. P. Smith for help in collating and ar- 

 ranging the tables of feeding trials ; and especially to Mr. F. B. Mor- 

 rison for faithful assistance covering the whole range of the book. 



October, 1910. W. A. HENRY. 



