LIST OF LITERATURE 165 



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Hurst, R. R. and MacLeod, D. J. (1936). Turnip brown heart. Sci. 

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 Insko, W. M., Lyons, M. and Martin, J. H. (19386). The quantitative 



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Jacks, G. V. and Scherbatoff, H. (1934). Soil deficiencies and plant 



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Dennis and O'Brien (1937). 

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leaf. Calif. Citrograph, 18, 107, 116-18. 

 Joltvette, J. P. and Walker, J. C. (1943). Effect of boron deficiency 



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 Josephs, H. W. (1932). Studies on iron metabolism and the influence 



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Keil, H. L. and Nelson, V. E. (1931). The role of copper in hemoglobin 



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 Keilin, D. and Mann, T. (1938). Polyphenol oxidase. Purification, 



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