346 RADIATION BIOLOGY 



and (1942) The effect of ionising radiations on the broad bean root. 



Brit. J. Radiology, 15: 39-42, 72-76, 320-336. 



and (1948) Comparison of the lethal effect of neutrons and gamma 



rays on mouse tumours (a) by irradiation of grafted tumors in vivo, (b) by irradi- 

 ation of tumour fragments in vitro. Brit. J. Radiology, 21: 5-10. 



and (1950) The effect of ionizing radiations on the broad bean root. 



VII. The inhibition of mitosis by alpha radiation. Brit. J. Radiology, 23: 300- 

 303. 



-, and H. Liebmann (1941) Comparison of the effects of neutron and 



7-ray ionisation on the electrophoretic mobility of colloidal graphite particles. 

 Brit. J. Radiology, 14: 102-106. 



Hagen, C. W., Jr., and R. E. Zirkle (1950) Comparative biological actions of cyclo- 

 tron fast neutrons and X rays. I. Lethal action on mice and rabbits. USAEC 

 Report CH-3903.* To appear in National Nuclear Energy Series, Div. IV, 

 Vol. 22D, Chap. 3. 



fHanson, F. B., Florence Heys, and Elizabeth Stanton (1931) The effect of increas- 

 ing X-ray voltages on the production of lethal mutations in Drosophila melanogas- 

 ter. Am. Naturalist, 65: 134-143. 



Henshaw, P. S., and D. S. Francis (1936) The biological measurement of 7-rays in 

 "equivalent roentgens." Radiology, 27: 569-583. 



, E. F. Riley, and G. E. Stapleton (1947) The biologic effects of pile radiations. 



Radiology, 49: 349-360. 



— , R. S. Snider, E. F. Riley, Jr., G. E. Stapleton, and R. E. Zirkle (1946a) 



Comparative late effects of single doses of fission neutrons and of gamma rays. 

 USAEC Report MDDC-1254.* To appear in National Nuclear Energy Series, 

 Div. IV, Vol. 22D. 



and (1946b) Comparative late effects of 



periodic doses of fission neutrons and of gamma rays. USAEC Report MDDC- 

 1253* To appear in National Nuclear Energy Series, Div. IV, Vol. 22D. 



fHodges, P. C, A. Brunschwig, and S. P. Perry (1936) Weitere Beobachtungen 

 liber den Einfluss der Wellenlange der Rontgenstrahlen auf die Hauttoleranz. 

 Strahlentherapie, 57: 241-253. 



HoUcroft, Joanne, and E. Lorenz (1951) The 30-day LDso of two radiations of dif- 

 ferent ion density. J. Natl. Cancer Inst., 12: 533-544. 



Holweck, F., and A. Lacassagne (1930) Sur le mccanisme de Taction cytocaustique 

 des radiations. Compt. rend. soc. biol., 103: 766-768. 



Horn, E. C. (1941) The relative biological effectiveness of roentgen rays and neu- 

 trons on the regeneration of the forelimb of Amblystoma larvae. Am. J. Roent- 

 genol. Radium Therapy, 46: 727-731. 



Jacobson, L. O., and Edna K. Marks (1947) Comparative biological actions of cyclo- 

 tron fast neutrons and X rays. II. Hematological effects in the rabbit. USAEC 

 Report MDDC-1372.* To appear in National Nuclear Energy Series, Div. IV, 

 Vol. 22D. 



fLangendorff, H., M. Langendorff, and A. Reuss (1933a) Uber die Wirkung von 

 Rontgenstrahlen verschiedener Wellenlange auf biologische Objekte. II. 

 Strahlentherapie, 46: 289-292. 



, , and (1933b) Uber die Wirkung von Rontgenstrahlen ver- 

 schiedener Wellenlange auf biologische Objekte. IV. Strahlentherapie, 46: 

 655-662. 



t and K. Sommermeyer (1940) Strahlenwirkimg auf Drosophilaeier. V. 



Die Schiidigung der 6 Stunden alten Eier durch Rontgenstrahlen in Abhiingigkeit 

 von der Wellenlange. Strahlentherapie, 68: 656-668. 



Lasnitzki, Use, and D. E. Lea (1940) The variation with wavelength of the biological 



