INTRODUCTION. 



The Farm Students' Review in 'publishing in book 

 form these papers by Prof. Willet M. Hays, now 

 Assistant Secretary of the United States Department 

 of Agriculture, believes it is doing public service, as, 

 well as undertaking a profitable enterprise for itself.. 

 These articles published in discontinuous parts cov- 

 ering two years in a weekly periodical, have not 

 had a fair presentation even to the readers of the 

 Breeders' Gazette. While they were not designed to- 

 be brought together in a book, but rather became a. 

 part of a rapidly developing subject currently discussed, 

 in the periodical mentioned, they give in an emphatic 

 way many of the theories of the author. The body of 

 knowledge he gathered after commencing' investiga- 

 tions in animal breeding, but using many plants for the- 

 oretical experiments, for demonstrating that the science 

 of breeding can be developed, and for the addition to 

 wealth of the State and Nation is here better ex- 

 than in any of his earlier publications. It is believed 

 by the Farm Students' Review that breeders of ani- 

 mals, breeders of plants, scientists who are studying 

 related problems, and students in agricultural schools 

 will appreciate these papers in book form. The price 

 has been placed low for a book of this size and char-- 

 acter. 



Address : 



FARM STUDENTS' REVIEW, 



St. Anthony Park, Minn. 



365777 



