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48. Livingstone, H., " Ethylene-oxygen anesthesia proves satisfactory and inexpensive," 



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49. Luckhardt, A. B., and J. B. Carter, "Ethylene as a gas anesthetic," /. Am. Med. 



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50. , and D. Lewis, "Chnical experiences with ethylene-oxygen anesthesia," 



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51. Lumsden, D. V., R. C. Wright, T. M. Whiteman, and J. Wise Byrnes, "Ethylene 



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54. Milbrath, J. A., E. Hansen, and H. Hartman, "The removal of leaves from ro.se 



plants at the time of digging," Oregon Agric. Exp. Sta. Bull. No. 385, 11 pp., 1940. 



55. Miller, E. V., J. R. Winston, and D. F. Fisher, "Production of epinasty by emana- 



tions from normal and decaying citrus fruits and from Penidllium digitatum," 

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