68 BTTLLETIX 905, U. S. DEPARTMENT OF AGRICULTURE. 
BOOKS ON THE BREEDING OF ANIMALS. 
Most of the references to experiments and other data given in the. 
present bulletin may be followed up through one or another of the 
following books, which may also be helpful to those who wish to go 
into the subject of breeding in more detail. 
The first two deal more with practical livestock breeding, the 
others with the physiology of reproduction, inbreeding, and out- 
breeding and the principles of heredity in a more theoretical aspect. 
The Breeding of Animals, by F. B. Mumford. 1917. 
Breeding Farm Animals, by F. R. Marshall. 1911. 
The Physiology of Reproduction, by F. H. A. Marshall. 1910. 
Inbreeding and Outbreeding, by E. M. East and D. F. Jones. 1919. 
Genetics, by H. E. Walter. 1922. 
Heredity and Environment, by E. G. Conklin. 1915. 
Genetics in Relation to Agriculture, by E. B. Babcock and R. E. Clausen. 1918. 
Genetics and Eugenics, by W. E. Castle. 1920. 
The Physical Basis of Heredity, by T. H. Morgan. 1919. 
The Mechanism of Mendelian Heredity, by T« H. Morgan, A. H. Sturtevant. H. J. 
Muller, and C. B. Bridges. 1915. 
ADDITIONAL COPIES 
OF THIS PUBLICATION MAY BE PROCCBED FROM 
THE SUPERLVTEXDEXT OF DOCUMENTS 
GOVERNMENT PRrXTLVG OFFICE 
WASHINGTON, D. C. 
AT 
IS CENTS PER COPY 
PURCHASER AGREES XOT TO RESELL OR DISTRIBUTE THIS 
COPY FOR PROFIT. — PUB*. RES. 57, APPROVED MAY 11. 1922 
V 
