360 GROWTH OF PLANTS 



3. Gnadinger, C. B., "Pyrethrum flowers," 269 pp., McLaughlin Gormley King Co., 



Minneapolis, Minn., 1933. 



4. , and C. S. Corl, "Studies on Pyrethrum flowers. I. The quantitative deter- 

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5. Graham, J. J. T., "Report on pyrethrum, derris, and cube," J. Assoc. Off. Agric. 



Chem., 23 : 551-556 (1940). 



6. Hartzell, A., "Naphthalene fumigation of greenhouses," J. Econ. Ent., 19:780-786 



(1926); also in B. T. I. Prof. Pap., 1 : 13-19 (1926). 



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/. Econ. Ent, 22 : 354-359 (1929); also in B. T. I. Prof. Pap., 1 : 97-102 (1929). 



8. , "Histopathology of insect nerve lesions caused by insecticides," C. B. T. I., 



6:211-223(1934). 



9. , "Pyrethrum culture in Dalmatia with some appUcations to the Americas," 



/. 'ecou. Ent., 36 : 320-325 (1943); also in B. T. I. Prof. Pap., 2 : 1-6 (1943). 



10. , "Further tests on plant products for insecticidal properties," C.B.T.I., 



13 : 243-252 (1944). 



11. , D. L. Collins, and W. E. Blauvelt, "Control of the holly leaf miner," C. 



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13. , and G. F. McKenna, "Prehminary experiments on the control of the holly 



leaf miner," C. B. T. I., 12 : 119-126 (1941). 



14. , and H. I. Scudder, "Histological effects of pyrethrum and an activator on the 



central nervous system of the housefly," /. Econ. Ent., 35 : 428-433 (1942). 



15. , and M. Strong, "Histological effects of piperine on the central nervous system 



of the housefly," C. B. T. I., 13 : 253-257 (1944). 



16. , and F. Wilcoxon, "The arsenic content of sprayed apples," J. Econ. Ent., 



20 : 204-212 (1927); also in B. T. I. Prof. Pap., 1 : 27-35 (1927). 



17. , , "Analyses of sprayed apples for lead and arsenic," /. Econ. Ent., 



21: 125-130 (1928); also in B. T. I. Prof. Pap., 1 : 42-47 (1928). 



18. , , "Naphthalene fumigation at controlled concentrations," J. Econ. Ent, 



23 : 608-618 (1930); also in C. B. T. I., 2 : 512-522 (1930). 



19. , , " Some factors affecting the efficiency of contact insecticides. II. Chemi- 

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20. , , "Experiments on the mode of action of pyrethrum and its effects on 



insect tissues," Travaux V« Congr. Internat. d'Ent. 1932, p. 289-293, 1933. 



21. , , "Organic thiocyanogen compounds as insecticides," C. B. T. I., 6 : 269- 



277 (1934). 



22. , , "Chemical and toxicological studies on organic thiocyanates," C. B. 



T.I.,7: 497-502 (1935). 



23. , , "Relative toxicity of pyrethrins I and II to insects," C.B.T.I., 



8 : 183-188 (1936). 



24. , , "Experiments on control of Japanese beetle larvae with /3,^'-dichloro- 



ethyl ether," C. B. T. I., 10 : 509-513 (1939). 



25. , , "Tests on certain organic compounds for control of adult Japanese 



beetle," C. B. T. I., 11(1939) : 83-86 (1940). 



26. , and F. Wilcoxon, "A survey of plant products for insecticidal properties," 



C. B. T. I., 12 : 127-141 (1941). 



27. , and W. J. Youden, "Efficiency of banding for the control of cankerworms," 



C. B. T. I., 7 : 365-377 (1935). 



28. Harvill, E. K., "Toxicity of various esters prepared from chrysanthemum monocar- 



boxyhc acid, the acidic portion of pyrethrin I," C. B. T. I., 10 : 143-153 (1939). 



29. , and J. M. Arthur, "Toxicity of organic compounds to houseflies," C. B. T. I., 



13 : 79-86 (1943). 



