BIBLIOGRAPHY 335 



. (1935). t'ber die additive Wirkung homologer Allele. Genelicn 



17, 270-290. 

 Hammett, F. S. (1931). The proliferation reaction of the skin to sulfhy- 



dryl and its biological significance. Protoplasm 13. 

 Hanson, F. B. (1928). The effect of X-rays in producing return gene 



mutations. Science 67, 562-563. 



and F. Heys. (1929). An analysis of the effects of the different 



rays of radium in producing lethal mutations in Drosophila. Amer. 

 Naturalist 63. 



Harder, R. (1927). Zur Frage nach der Rolle von Kern und Protoplasma 

 im Zellgeschehen und bei der fjbertragung von Eigcnschaften. Zeitschr. 

 f. Botanik 19. 



. (1934). t)ber die Musterbildung an Petunienbluten. Nachr. 



Ges. Wiss. Gottingen Math.-Physik. Kl. Fachgr. VI, Biologie, N.F. 

 1, No. 2. 



Hardesty, Mary. (1933). The feather of the guinea fowl and mathe- 

 matical theory of individual feather patterns. Jour. Exp. Zool. 66. 



. (1935). The effect of thyroxin injections upon the feather of the 



guinea fowl. Jour. Exp. Zool. 71, 389-416. 



Harland, S. C. (1932). The genetics of Gossypium. Bibliog. Genetica 9. 



. (1934). The genetics of cotton. IX. Further experiments on the 



inheritance of the crinkled dwarf mutant of G. barbadense L. on inter- 

 specific crosses and their bearing on the Fisher theory of dominance. 

 Jour. Genetics 28. 



Harnly, M. H. (1929). An experimental study of environmental factors 

 in selection and population. Jour. Exp. Zool. 53, 141-170. 



. (1930a). A critical temperature for lengthening of the vestigial 



wings of Drosophila melanogaster with sexually dimorphic effects. 

 Jour. Exp. Zool. 56, 363-368. 



. (19306). A sexually dimorphic response to a critical temperature 



during a critical period of development in Drosophila melanogaster. 

 Proc. 2d Internal. Congr. Sex Res. 



. (1932). The temperature-effective period for the lengthening 



of the vestigial wings of Drosophila. Proc. 6th Internal. Congr. Genetics 2. 



. (1933). The growth curves of the length of the vestigial wings 



of D. melanogaster. Amer. Naturalist 67. 



. (1936). The temperature-effective periods and the growth 



curves for length and area of the vestigial wings of Drosophila melano- 

 gaster. Genetics 21. 



and M. L. Harnly. (1935). The effects of temperature on the 



wings and the eyes of the dimorphous vestigial combination in D. 

 melanogaster. Jour. Exp. Zool. 72. 



and . (1936). The effects of the gene on growth and 



differentiation as shown by the temperature responses of pennant and 

 its heterozygote in D. melanogaster. Jour. Exp. Zool. 74. 

 Harrison, J. W. H. (1920a). Genetical studies in the moths of the 

 geometrid genus Oporabia (Oporinia) with a special consideration of 

 melanism in the lepidoptera. Jour. Genetics 9. 



