644 GENETICS IN RELATION TO AGRICULTURE 



1912. Ueber Veranderung der Form, Farbe und Zeichnung von Kar.arieneiern 

 durch Bastardierung. Arch. Ges. Physiol, 148. 



TUFTS, W. P., 1914. An inquiry into the nature of a somatic segregation of char- 

 acters in the Le Conte pear. Ore. A.E.S., Bull. 123. 



TUPPER, W. W., and BARTLETT, H. H., 1916. A comparison of the wood structure 

 of (Enolhera stenomeres and its tetraploid mutation gigas. Genetics, 1. 



TYZZER, E. E., 1909. A study of the inheritance in mice with reference to their 

 susceptibility to transferable tumors. Jour. Med. Research, 21. 



VAN FLEET, W., 1914. Chestnut breeding experience. Jour. Hered., 5. 



VAVILOV, N. I., 1915. Breeding for resistance to rust and mildew in wheat. Jour. 

 Gen., 4. 



VERNON, H. M., 1903. "Variation in Animals and Plants," New York. 



VIALA, P., and RAVAZ, L. "American Vines," second ed. (translation by R. Dubois 

 and E. H. Twight). San Francisco. 



DE VILMORIN, P., 1911 (1913). Repts. 4th Intern. Conf. Genet., Paris. 



DE VILMORIN, P., and BATESON, W., 1911. A case of gametic coupling in Pisum, 

 Proc. Roy. Soc., B, 84. 



DE VRIES, H., 1901-3. "Die Mutationstheorie," Leipzig. 



1905. "Species and Varieties; Their Origin by Mutation," Chicago. 



1907. "Plant-breeding; Comments on the Experiments of Nilsson and Bur- 

 bank," Chicago. 



1907a. On twin hybrids. Bot. Gaz., 44. 



1908. Uber die Zwillingsbastarde von (Enothera nanetta. Ber. Deutsch. Bot. 

 Ges., 26, a. 



1908a. Bastarde von (Enothera gigas. Ber. Deutsch. Bot. Ges. 26, a. 



1909. On triple hybrids. Bot. Gaz., 49. 



1911. Uber doppeltreziproke Bastarde von fEnothera biennis und : O. muricata. 

 Biol. Centr., 31. 



1913. " Gruppenweise Artbildung," Berlin. (Contains complete bibliography 

 of (Enothera papers, 1901-12.) 



1914. The probable origin of (Enothera Lamarckiana Ser. Bot. Gaz., 17. 



1915. Ueber kiinstliche Beschlennigung der Wasseraufnahme in Samen durch 

 Druck. Biol. Centr., 35. 



1915a. (Enothera gigas nanetta, a Mendelian mutant. Bot. Gaz., 60. 



1916. New dimorphic mutants of the (Enotheras. Bot. Gaz., 62. 



WAGNER, R. J., 1916. Hydrogen ion concentration and natural immunity in plants. 



Cent. Bakt. (etc.), 2 Abt. 44, Nos. 24, 25. (Abstr. in E.S.R., 36, 6.) 

 VON WAHL, H., 1907. Fruchtbare Maultiere. Jahrb. f. ivissenschf. u. prakt. Tier- 



zucht. 

 WARBURTON, C. W.; BURNETT, L. C.; and LOVE, H,. H., 1914. Tests of selections 



from hybrids and commercial varieties of oats. U.S.D.A., Bull. 99. 

 WARNER, D. E., 1916. Prolific layers and how to select them. Field, 26. 

 WAUQH, F. A., 1917. Hybrid fruits that have made good. Country Gent., 



82, 44. 

 WEATHERWAX, P., 1916. Morphology of the flowers of Zea mays. Bui. Torrey Bot. 



Club, 43. 

 WEBBER, H. J., 1900. Complications in citrus hybridization caused by polyembryony. 



Bot. Gaz. 29; Science, n. s., 11. 



1904. New citrus fruit creations of the Department of Agriculture. Yearbook 



U.S.D.A. 



1906. Citrus hybrids. Re-pi. Am. Breed. Assoc., I. 



1906o. New citrus and pineapple productions. Yearbook U.S.D.A 



