514 RADIATION BIOLOGY 



Holdsworth, M., and P. S. Nutman (1947) Flowering responses in a strain of 



Orobanche minor. Nature, 160: 223-224. 

 Jenner, C. E. (1951) Photoperiodism in the fresh-water pulmonate snail Lymnaea 



palustris. Ph.D. Thesis, Department of Biology, Harvard Univ., Cambridge, 



Mass. 

 Katunskij, V. M. (1937) Dependency of photoperiodic reactions of plants on the 



spectral composition of light. Compt. rend. acad. sci. U.R.S.S., 15: 509-512. 

 Kerling, L. C. P. (1950) Developmental processes of the rice plant in relation to 



photoperiodism. II. Koninkl. Ned. Akad. Wetenschap. Proc, 53: 1617-1633. 

 Kleshnin, A. F. (1943) On the role of spectral composition of light in photoperiodic 



reaction. Compt. rend. acad. sci. U.R.S.S., 40: 208-211. 



(1946) Role of spectra of visible light in photoperiodic and formative proc- 

 esses at various developmental phases. Compt. rend. acad. sci. U.R.S.S., 52: 

 813-816. 



Knott, J. E. (1934) Effect of a localized photoperiod on spinach. Proc. Am. Soc. 



Hort. Sci., 31: 152-154. 

 Lang, A. (1948) Beitrage zur Genetik des Photoperiodismus. Lotsya, 1: 175-189. 



(1949) Entwicklungsphysiologie. In Fortschritte der Botanik. Springer- 



Verlag OHG, Berlin. Chap. 19. 



(1952) Physiology of flowering. Ann. Rev. Plant Physiol., 3: 265-306. 



Lang, A., and G. Melchers (1941) Uber den hemmenden Einfluss der Blatter in der 



photoperiodischen Reaktion der Pflanzen. Naturwissenschaften, 29: 82-83. 

 (1943) Die photoperiodische Reaktion von Hyoscyarnus niger. Planta, 33: 



653-702. 

 Langham, D. G. (1940) The inheritance of intergeneric differences in Zea-Euchlaena 



hybrids. Genetics, 25: 88-107. 

 Leopold, A. C, and K. V. Thimann (1949) The effect of auxin on flower initiation. 



Am. J. Botany, 36: 342-347. 

 Little, T. M., J. M. Kantor, and B. A. Robinson, Jr. (1940) Early and virescent 



marigolds. J. Heredity, 31: 73-78. 

 Liverman, J. L. (1952) The physiology and biochemistry of flowering. Ph.D. 



Thesis, Calif. Inst. Tech., Pasadena. 

 Lona, F. (1946) Sul comportamento fotopcriodico di alcune specie di Xanthium. 



N. giorn. bot. ital. n.s., 53: 635-656. 

 (1947) Esigenze fotoperiodiche dei poliploidi e loro significato ecologico e 



fitogeografico. N. giorn. bot. ital. n.s., 54: 1-4. 



(1950) Dominare i fenomeni di fioritura. Humus, 6: 6-10. 



Lyman, C. P. (1943) Control of coat color in the varying hare, Lepus americanus 

 Erxleben. Bull. Museum Comp. Zool., Harvard Univ., 93: 393-461. 



Marcovitch, S. (1924) The migration of the Aphididae and the appearance of the 

 sexual forms as affected by the relative length of daily light exposure. J. Agr. 

 Research, 27: 513-522. 



Marshall, A. J. (1950) Mechanism and significance of the "refractory period" m 

 the avian testis cycle. Nature, 166: 1034-1035. 



Marshall, F. H. A. (1936) The Croonian lecture: sexual periodicity and the causes 

 which determine it. Phil. Trans. London Roy. Soc, B226: 423-456. 



Marshall, F. H. A., and F. P. Bowden (1934) The effect of irradiation with different 

 wave lengths on the oestrous cycle of the ferret, with remarks on the factors 

 controlling sexual periodicity. J. Exptl. Biol., U: 409-422. 



Maximov, N. A. (1929) Experimentelle Anderungen der Liinge der Vegetations- 

 periode bei den Pflanzen. Biol. Zentr., 49: 513-543. 



Melchers, G. (1939) Die Bluhhormone. Ber. deut. botan. Ges., 57: 29-48. 



Melchers, G., and A. Lang (1941) Weitere Untersuchungen zur Frage der Bluhhor- 

 mone. Biol. Zentr.. 61: 16-39. 



