820 RADIATION BIOLOGY 



(1940d) Further studies on the action of roentgen rays on the gametes of 



Arbacia punctulata. VI. Production of multipolar cleavage in the eggs by 

 exposure of the gametes to roentgen rays. Am. J. Roentgenol. Radium Therapy, 

 43: 923-933. 



(1941) The induction of multipolar cell division with X-rays and its possible 



significance. Radiology, 36: 717-724. 



and I. Cohen (1940) Further studies on the action of roentgen rays on the 



gametes of Arbacia punctulata. IV. Changes in radiosensitivity during the first 

 cleavage cycle. Am. J. Roentgenol. Radium Therapy, 43: 917-920. 



and D. S. Francis (1936) The effect of X-rays on cleavage in Arbacia eggs: 



evidence of nuclear control of division rate. Biol. Bull., 70: 28-35. 



C. T. Henshaw, and D. S. Francis (1933) The effect of roentgen rays on 



the time of the first cleavage in marine invertebrate eggs. II. Differential 

 recovery and its influence when different experimental methods are used. Radi- 

 ology, 21: 533-544. 



Hertel, E. (1905) Ueber die Einwirkung von Lichtstrahlen auf den Zellteilungs- 

 prozess. Z. allgem. Physiol., 5: 535-565. 



Hevesy, G. (1945) On the effect of roentgen rays on cellular division. Rev. Mod. 

 Phys., 17: 102-111. 



Jungling, O., and H. Langendorff (1930) Uber die Wirkung verschieden hoher Ront- 

 gendosen auf den Kernteilungsablauf bei Vicia faba equina. Strahlentherapie, 

 38: 1-10. 



Juul, J., and T. Kemp (1933) Uber die Einfluss von Radium-und Rontgenstrahlen, 

 ultraviolettem Licht und Hitze auf die Zellteilung bei warmblutigen Tieren. 

 Studicn on Gewebekulturen. Strahlentherapie, 48: 457-499. 



Kemp, T., and J. Juul (1930) Influence of various agents (X-rays, radium, 

 heat, ether) upon mitosis in tissue cultures. Acta Path. Microbiol. Scand., 7: 

 279-308. 



and (1932) Influence of ultraviolet rays upon mitosis in tissue cul- 

 tures. Acta Path. Microbiol. Scand., 9: 222-235. 



Knowlton, N. P., Jr., and L. H. Hempelmann (1949) The effect of X-rays on the 

 mitotic activity of the adrenal gland, jejunum, lymph node and epidermis of the 

 mouse. J. Cellular Comp. Physiol., 33: 73-91. 



, , and J. G. Hoffman (1948) The effects of X-rays on the mitotic 



activity of mouse epidermis. Science, 107: 625-626. 



and W. R. Widner (1950) The use of X-rays to determine the mitotic and 



intermitotic time of various mouse tissues. Cancer Research, 10: 59-63. 

 Koller, P. C. (1943) The effects of radiation in pollen grain development, differentia- 

 tion, and germination. Proc. Roy. Soc. Edinburgh, B61: 398-429. 

 La Cour, L. F. (1951) Combined effects of X-rays and temperature on mitosis. 



Nature, 167: 318-319. 

 Lasnitski, I. (1940) The effect of X-rays on cells cultivated in vitro. Brit. J. 



Radiology, 13: 279-284. 

 (1943a) The effect of X-rays on cells cultivated in vitro. Part II. Recovery 



factor. Brit. J. Radiology, 16: 61-67. 

 (1943b) The response of cells in vitro to variations in X-ray dosage. Brit. J. 



Radiology, 16: 137-141. 



— (1945) A quantitative analysis of the effect of gamma radiation on malignant 



cells in vitro and in vivo. Brit. J. Radiology, 18: 214-220. 

 (1946) The effect of dose rate variations on mitosis and degeneration in 



tissue cultures of avian fibroblasts. Brit. J. Radiology, 19: 250-25(1. 

 (1947) A quantitative analysis of the direct and indirect action of X-radia- 



tion on malignant cells. Brit. J. Radiology, 20: 240-247. 



