INGO W. D. HACKH 



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comparison the average composition of these compounds or foods is 

 given in Columns 4, 5, 6, and 7 of Table I. 



Regarding the distribution of the elements in the biosphere, there 

 are the nine essential elements which are invariably present in the 

 cell: C, H, O, N, P, S, Mg, Fe, and K, while eight more seem also to 

 be important, for they are always present in small amounts in plant 



TABLE I. 



Distribution of Bioelements. 



Column 2 represents, in per cent, the elementary composition of man; Col- 

 umns 4, 5, 6, and 7 give the average composition of common foods. The data of 

 Column 3 are calculated from the results of Little and represent the elementary 

 composition of the long leaf pine. 



