1032 
Journal of Agricultural Research 
Vd. XXVIII, No 10 
(7) Hayes, H. K., and Garber, R. J. 
1921. breeding crop plants. 328 p., illus. New York. 
(8) Howard, A., and Howard, G. L. C. 
1915. ON THE INHERITANCE OP SOME CHARACTERS IN WHEAT. II. Mem. 
Dept. Agr. India Bot. Ser. 7: 273-285, illus. 
(9) Percival, J. 
1921. the wheat plant. 463 p., illus. London. 
(10) Sax, K. 
1921. STERILITY IN WHEAT HYBRIDS. II. CHROMOSOME BEHAVIOR IN 
partially sterile hybrids. Genetics 7: 513-552, illus. 
1923. THE RELATION between chromosome number, morphological 
CHARACTERS AND RUST RESISTANCE IN SEGREGATES OP PAR¬ 
TIALLY sterile wheat hybrids. Genetics 81 301-321, illus. 
(12) Spillman, W. J. 
1909. the hybrid wheats. Wash. Agr. Exp. Sta. Bui. 89, 27 p., illus. 
