4 2 4 
Journal of Agricultural Research voi. xxvii, No. 6 
Manganese occurs in largest quantities in the liver, kidney, and pan¬ 
creas of animals, which leads to the assumption that it has important 
functions to perform in each of these organs. The occurrence of man¬ 
ganese in those parts of plant and animal tissues with vitamin potency 
suggests the idea that manganese is either directly or indirectly connected 
with the vital factors in these tissues. 
The value of certain compounds of manganese in medicine has long 
been recognized, and especially so in preparations intended as cures for 
nervousness. Feeding experiments are now in progress to test the hy¬ 
pothesis that manganese is a vital factor in animal nutrition. 
The fact that manganese is a necessary element in plant growth and 
that it is found in largest quantities in plant and animal tissues which 
contain the greatest vitamin potency, leads the author to assume that 
a relationship exists between this element and the vital factors contained 
in these tissues. 
LITERATURE CITED 
(1) Bertrand, Gabriel, and MsdigrEceanu, F. 
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(6) - 
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manganese for agricultural purposes. In Jour. Indus, and Engin. 
Chem., v. 11, p. 332-335, 4 fig- 
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(8) Osborne, Thomas B., and Mendel, Lafayette B. 
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(9) PlimmEr, Violet G., and Plimmer, R. H. A. 
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(10) Seidell, Atherton. 
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