PREFACE 



Lehmann Standards," prepared by the authors and based upon the 

 recent findings of the scientists in this and other countries. A chap- 

 ter on "Economy in Feeding Live Stock" points out some of the 

 economic principles which must be considered in the feeding and care 

 of live stock to realize the largest profits. 



Part II discusses all the important feeding stuffs used in this 

 country, rather than merely the feeds available in any particular 

 district. This permits the teacher to give the most attention to the 

 feeds of local importance, perhaps omitting others entirely. Finally, 

 the chapter on "Manurial Value of Feeding Stuffs" points out the 

 vital relation of animal husbandry to the economical maintenance of 

 soil fertility. 



Part III takes up the practical feeding, care, and management of 

 each class of live stock and summarizes the special value of the impor- 

 tant feeds for each class of animals. Most of the tables giving sum- 

 maries of the important feeding trials at the Experiment Stations, con- 

 tained in the corresponding part of "Feeds and Feeding," are 

 omitted in the abridged edition. Instead, the authors have presented 

 in simple terms their conclusions on the value of the different feeding 

 stuffs and of the various methods of feeding and caring for stock. 



The Appendix Tables, condensed from the much more extensive 

 Appendix Tables of "Feeds and Feeding," show the composition and 

 the digestible nutrients and the fertilizing constituents in the most 

 important American feeds. As these tables are specially protected by 

 copyright, they can be given in no other texts on stock feeding. 



The authors wish to thank the following for assistance : Mrs. Elsie 

 Bullard-Morrison, who has rendered invaluable aid on every page 

 of the book; Prof. J. A. James of the Department of Agricultural 

 Education, University of Wisconsin, and formerly Superintendent of 

 the Racine County, Wisconsin, School of Agriculture, who has made 

 valuable suggestions in adapting the book to the needs of secondary 

 schools: and Prof. J. G. Halpin of the University of Wisconsin, who 

 greatly aided in the preparation of the chapters on poultry. For ad- 

 ditional suggestions incorporated in these chapters the authors are 

 indebted to the following works : Lippincott, ' ' Poultry Production ; ' ' 

 Lewis, "Productive Poultry Husbandry;" and Robinson, "Principles 

 and Practice of Poultry Culture." Credit is given in each instance 

 to those loaning illustrations for use in the book. 



W. A. Henry 

 F. B. Morrison 

 Madison, Wis. 



February, 1917. 



