PLANT LIFE. 57 



REFERENCES FOR COLLATERAL READING. 

 PLANT LIFE. 



Yearbooks of the U. S. Dept. of Agriculture : 



1896 The superior value of large heavy seed. 



1897 Hybrids and their utilization in plant breeding. 



1898 Pollination of pomaceous fruits. 



1898 Improvement of plants by selection. 



1899 Progress of plant breeding in the United States. 

 Bureau of Plant Industry, U. S. Dept. of Agriculture, Bulletin Nos. : 



58 The vitality and germination of seeds. 



78 Improving the quality of wheat. 



96 Tobacco breeding. 



Division of Vegetable Physiology and Pathology, U. S. Dept. of 

 Agriculture, Bulletin No. : 



29 Plant breeding. 

 Farmers' Bulletin, No. : 



157 The propagation of plants. 

 Experiment Station Bulletin, No. : 



251 Cornell Plant breeding for farmers. 

 Books : 



Plant Breeding Bailey Macmillan Co., New York City. 



The Essentials of Botany Bessey Henry Holt & Co., New 

 York City. 



