LITERATURE CITATIONS 315 



SPILLMAN, W. J., 1901. Quantitative studies in the transmission of parental 

 characters to hybrid offspring. U. S. Dept. Agr., Office Exp. Sta., 

 Bull. 115, 88-97. 



1909. The hybrid wheats. Washington Agr. Exp. Sta., Bull. 89, 

 3-27. 

 1911. Inheritance of the "eye" in Vigna. Am. Nat., 45 : 513-523. 



1913. Color correlation in cowpeas. Science N. S., 38 : 302. 

 SPRAGG, F. A., 1919. Robust beans. Michigan Agr. Exp. Sta., Quart. 



Bull. 1: 173-174. 

 SPRAGG, F. A., and CLARK, A. J., 1916. Red Rock wheat. Michigan Agr. 



Exp. Sta. Cir. 31, 7 pp. 

 STAKMAN, E. C., HAYES, H. K., AAMODT, OLAF S., and LEACH, J. G., 1919. 



Controlling flax wilt by seed selection. Jour. Am. Soc. Agron., 



11:291-298. 

 STAKMAN, E. C., LEVINE, M. N., and LEACH, J. G., 1919. New biologic 



forms of Puccinia graminis. Jour. Agr. Res., 16: 103105. 

 STEWART, F. C., 1916. Observations on some degenerate strains of potatoes. 



New York (Geneva) Agr. Exp. Sta., Bull. 422: 319-357. 

 STEWART, J. B., 1908. The production of cigar-wrapper tobacco under 



shade in the Connecticut Valley. U. S. Dept. Agr., Bur. Plant Indust., 



Bull. 138, 31 pp. 

 STEWART, J. P., 1912. Factors influencing yield, color, size, and growth in 



apples. Ann. Rept. Pennsylvania State College for 1910-11 : 401-492. 

 STOUT, A. B., 1915. The establishment of varieties in Coleus by the selec- 

 tion of somatic variations. Carnegie Inst. of Wash., Pub. 218: 1-80. 



1920. Further exper mental studies on self-incompatibility in herma- 

 phrodite plants. Jour. Genetics, 9 : 104. 

 STUART, WM., 1915. Potato breeding and selection. U. S. Dept. Agr., 



Bur. Plant Indust., Bull. 195, 35 pp. 

 STURTEVANT E. L., 1899. Varieties of corn. U. S. Dept. Agr., Office Exp. 



Sta., Bull. 57, 51-108. 

 SURFACE, F. M., 1916. Studies on oat breeding. III. On the inheritance 



of certain glume characters in the cross A. fatua X A. sativa, variety 



Kherson. Genetics, 1 : 252-286. 

 SURFACE, F. M., and ZINN, JACOB, 1916. Studies on oat breeding. IV. 



Pure line varieties. Main Agr. Exp. Sta., Bull. 250: 97-148. 

 SUTTON, A. W., 1908. Brassica crosses. Jour, of Linn. Soc., 38 : 337-349. 

 SUTTON, G. L., 1910. Varieties of wheat recommended by the Department 



of Agriculture. Agr. Gaz. of N. S. Wales, 21: 185-193. 

 SUTTON, IDA, 1918. Report on tests of self-sterility in plums, cherries, and 



apples at the John Innes Horticultural Institution. Jour. Genetics, 



7:281-300. 

 SWINGLE, W. T., 1913. Some new citrous fruits. Am. Breeders' Mag., 



4:83-95. 

 TAMMES, TINE, 1911. Das Verhalten fluktuierend variierender Merkmale 



bei der Bastardierung. Rec. Trav. Bot. Neerl., 8: 201-288. 



1914. The explanation of an apparent exception to Mendel's law of 

 segregation. Koninklyke Akademe van Wetenschappen. Te Amster- 

 dam., 16: 1021-1031. 



