THE PRINCIPLES OF BREEDING: 

 THREMMATOLOGY 



By EUGENE DAVENPORT, Dean of the College of Agriculture, Director of the 

 Agricultural Experiment Station, and Professor of Threm- 

 matology in the University of Illinois 



8vo, cloth, 727 pages, illustrated, $2.50 



" Principles of Breeding " is a pioneer in the worthy endeavor 

 to- collate with the practical side of breeding the results of 

 recent research in the processes and factors which govern the 

 evolution of plants and animals. It sets forth the tasks in- 

 volved in improving plants and animals, and familiarizes the 

 reader with the methods employed for the quantitative and 

 accurate determination of the extent and range of variability. 

 It is therefore a book for both the student of agriculture in 

 college and the practical breeder on the farm. 



DOMESTICATED 

 ANIMALS AND PLANTS 



By EUGENE DAVENPORT, Dean of the College of Agriculture, Director of the 

 Agricultural Experiment Station, and Professor of Threm- 

 matology in the University of Illinois 



8vo, cloth, 321 pages, illustrated, $1.25 



THE aim of this work is to stimulate a widespread interest 

 in domesticated animals and plants to account for their origin, 

 describe their life in the wild, explain their appropriation by man, 

 show our dependence upon their services, state clearly the 

 methods and principles of their further improvement and, 

 incidentally, to explain heredity in such a simple way as to 

 bring within the range of the young student and the general 

 reader the main facts of transmission, applicable alike to plant 

 and animal improvement, and to human relations as well. 



The literature of this subject is too intensely technical for the 

 ordinary reader. The endeavor has been to make this book so 

 simple and clear that it may be adapted alike to the secondary 

 school, normal school, college, and to the needs of the general 

 reader. 



GINN AND COMPANY PUBLISHERS 



