1917] 
DUGGAR—FUNGI IN PLANT DECOCTIONS 287 
dication that the addition of nitrogen to the salmon decoction 
does not materially influence growth. 
In this paper the criterion by which the value of a solu- 
tion is judged is that of the weight of mycelium produced. 
4,4 
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Fig. Growth of Aspergillus and Gloeosporium on salmon decoction 
and die nutrients; Aspergillus, solid line; Gloeosporium, broken line. 
This is a practical criterion for general purposes, but the 
pathologist is particularly interested in ‘‘normal’’ growth, 
which often means considerable growth and abundant ба. 
ing. Апу data, therefore, which bear upon the relation of 
