USEFUL REFERENCES 643 



Davenport, Heredity in Relation to Eugenics. (Henry Holt & Co. 

 1911.) 



Downing, The Third and Fourth Generation. (University of Chicago 

 Press. 1918.) 



Farmers' Bulletins: 195, 461, 576, 619, 887, 952, 1040, 1167, 1192, 

 1209, 1263, 1332, 1369. 



Goddard, The Kallikak Family. (The Macmilian Co. 1919.) 



Guyer, Being Well- Born. (Bobbs-Merrill Co.) 



Harrow, Glands in Health and Disease. (E. P. Dutton & Co. 1922.) 



Harwood, New Creations in Plant Life. (The Macmilian Co.) 



Jennings, Prometheus. (E. P. Dutton & Co. Inc.) 



Jones, Genetics in Plant and Animal Improvement. (John Wiley & 

 Sons. 1924.) 



Journal of Heredity, Numerous Articles. (American Genetic Associa- 

 tion, Washington.) 



Morgan, Evolution, Genetics and Eugenics. (University of Chicago Press. 

 1925.) 



Shull, Heredity. (McGraw-Hill Co. 1926.) 



Walter, Genetics. (The Macmilian Co. 1922.) 



