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11. Arthur, J. M., and J. M. Newell, "The kilhng of plant tissue and the inactivation 



of tobacco mosaic virus by ultra-violet radiation," Am. J. Bot., 16 : 338-353 

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12. , and L. C. Porter, "A new type of insulated greenhouse heated and Ughted by 



Mazda lamps," C. B. T. I., 7 : 131-146 (1935). 



13. , and W. D. Stewart, "Transpiration of tobacco plants in relation to radiant 



energy in the visible and infra-red," C. B. T. I., 5: 483-501 (1933). 



14. , , "Relative growth and dry weight production of plant tissue under 



Mazda, neon, sodium, and mercury vapor lamps," C. B. T. I., 7 : 119-130 (1935). 



15. Brown, H. T., and F. PJscombe, "Researches on some of the physiological processes 



of green leaves, with special reference to the interchange of energy between the 

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17. , and H. A. Allard, "Effect of the relative length of day and night and other 



factors of the environment on growth and reproduction in plants," J. Agric. Res., 

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18. Guthrie, J. D., "Effect of environmental conditions on the chloroplast pigments," 



Am. J. Bot., 16 : 716-746 (1929); also in C. B. T. I., 2 : 220-250 (1929). 



19. Hess, A. F., and M. Weinstock, "Antirachitic proijerties imparted to inert fluids 



and to green vegetables by ultraviolet irradiation," /. Biol. Chem., 62 : 301-313 

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20. Kraus, E. J., and H. R. Kraybill, "Vegetation and reproduction with special 



reference to the tomato," Oregon Agric. E.xp. Sta. Bull. 149, 90 pp., 1918. 



21. Leonard, C. S., and J. M. Arthur, "The reputed influence of ultraviolet Ught on the 



yield of Digitalis glucosides," /. Am. Pharmaceut. Assoc, 23 : 224-228 (1934). 



22. Lojkin, M., "Some effects of ultraviolet rays on the vitamin D content of plants as 



compared with the direct irradiation of the animal," C. B. T. I., 3 : 245-265 

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23. , "Moisture and temperature requirements for yarovization of winter wheat," 



C. B. T. I., 8 : 237-261 (1936). 



24. LundegHrdh, H., "Der Kreislauf der Kohlensiiure in der Natur," 308 pp., G. Fischer, 



Jena, 1924. Same as Biochem. Zeitschr., 131 : 109-115 (1922). 



25. Miller, E. C, "Plant physiology," 2nd ed., 1201 pp., McGraw-Hill Book Co., 



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26. "Organization, equipment, dedication," C. B. T. I., 1 : 1-58 (1925). 



27. Pfeiffer, N. E., " Microchemical and morphological studies of effect of light on 



plants," Bot. Gaz., 81 : 173-195 (1926); also in C. B. T. I., 1 : 123-145 (1926). 



28. , "Anatomical study of plants grown under glasses transmitting hght of various 



ranges of wave lengths," Bot. Gaz., 85:427-436 (1^28); also in C.B.T.I., 

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29. Popp, H. W., "A physiological study of the effect of light of various ranges of wave 



length on the growth of plants," Am. J. Bot., 13:706-736 (1926); also in 

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30. Schanz, F., "Einfluss des Lichtes auf die Gestaltung der Vegetation," Ber. Deutsch. 



Bot. Ges., 36 : 619-632 (1918). 



31. , "Wirkungen des Lichts verschiedener Wellenlange auf die Pflanzen," Ber. 



Deutsch. Bot. Ges., 37 : 430-442 (1919). 



32. Shirley, H. L., "The influence of light intensity and light quality upon the growth 



of plants," Am. J. Bot., 16:354-390 (1929); also in C.B.T.I., 2:159-195 

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33. , "Light requirements and silvicultural practice," J. Forest., 27:535-538 



(1929). 



34. , "A thermoelectric radiometer for ecological use on land and in water," 



Ecology, 11 : 61-71 (1930); also in B. T. I. Prof. Pap., 1 : 103-113 (1930). 



