PREFACE ? 



are marked under illustrations: "An. I." for Animal 

 Industry, and "PL I." for Plant Industry. Credits are 

 given with the name of the station to those furnished by 

 State Experiment Stations: "Kans.," "W. Va.," "Wis.," 

 "N. J.," "Minn.," "Maine," "Cornell." Professors Harry 

 R. Lewis and Maurice A. Blake kindly supplied a number 

 of photographs; animal photographs were also given by F. 

 Warren Sumner, of Elizabeth, N. J., the White Wyandotte 

 Hen; Thos. Wyckoff, Orchard Lake, Mich., the Rambouillet 

 Ram; Cornell Countryman, the Dorsets; Chas. Leet, Mantua, 

 Ohio, Southdown Ewe; R. C. Parsons, Grand Ledge, Mich., 

 Oxford Ram; A. T. Gamber, Wakeman, 0., American Merino. 

 Cuts have been loaned by the author and the J. B. Lippin- 

 cott Co. from John B. Smith's "Insect Friends and Ene- 

 mies," and "Economic Entomology." 



The author will be glad to receive suggestions and cor- 

 rections from teachers and others regarding any mistakes 

 in the book. 



THE chapter on Cotton was added in the second edition. 

 The third edition included a number of changes in the Appen- 

 dix tables to bring the matter up to date. Suggestions to 

 Teachers for additional exercises and projects were added to 

 the Appendix. Changes and many additions were made 

 through the text in both the third and fourth editions. 

 Much of the new Part V was added in the fourth edition. 

 The present Chapters XVI and XXXI were added. A 

 Southern Edition was issued in 1919. In the fifth edition 

 1922, the Swine Chapter (XXVI) was rewritten, enlarged 

 and adapted tohome project methods; Chapters on Sheep, and 

 Poultry were likewise much improved by the addition of 

 matter on projects, debates, contests and fresh references. 



