Appendix D 345 



1907. RUSBY, H. H., The Wild Grains and Nuts of the United 

 States. Jour. N. Y. Bot. Gard. 7 : 269-273. 



1907. SHAMEL, A. D., and COBEY, W. W., Tobacco Breeding. 

 U. S. Dept. Agr. Bur. Plant Ind. Bull. 96 : 1-67, 10 pis. & 

 14 figs. 



1907. SHAMEL, A. D., The Art of Seed Selection and Breeding. 

 U. S. Dept. Agr. Yearbook, 221-236, 5 pis. Same. Year- 

 book separate, 446 : 221-236 5 pis. 



1907. SHEPARD, W. F., The Calculation of the Moments of a 

 Frequency Distribution. Biometrika, 5 : 450-459. Rev. in 

 Am. Nat. 42 : 418-422. 



1907. SHULL, G. H., Results of Crossing Bursa bursa-pastoris 

 and Bursa Heegeri. Intern. Zool. Congress, 7th Proc. 

 (6 pp.) Boston. Cambridge, Mass. 1910. 



1907. SPALDING, V. M., The Artificial Production of Mutants. 

 Science, n.s. 26 : 349-350. 



1907. SPILLMAN, W. J., Standardizing Breed Characteristics. 

 Soc. for Prom. Agr. Sci. Proc. 28: 116-120. 



1907. STOLL, Ein interessanter Bastard zwischen einem Emmer 

 und Kolbenspelze. Deutsche Landw. Presse, 100. 



1907. VILMORIN, PH. DE, Evolution et Selection, theories an- 

 ciennes et nouvelles. Paris. Soc. Agr. de France. 



1907. VRIES, H. DE, Luther Burbank's Ideas on Scientific Horti- 

 culture. Century Mag. 73:674-681. Illus. 



1907. VRIES, H. DE, Evolution and Mutation. The Monist, 

 17:6. 



1907. VRIES, H. DE, On Twin Hybrids. Bot. Gaz. 44 : 401- 

 407. 



1907. WEBBER, H. J., and BOYKIN, F. B., The Advantage of 

 Planting Heavy Cotton Seed. U. S. Dept. Agr. Farmers' 

 Bull. 285: (16pp.), 6 figs. 



1907. WIGHT, W. F., The History of the Cowpea and its Intro- 

 duction into America. U. S. Dept. Agr. Bur. PI. Ind. Bull. 

 1026:1-21. PI. 1-3. 



