1917] 
DUGGAR—FUNGI IN PLANT DECOCTIONS 169 
than antieipated on several of the other media. In further 
work extensive comparisons will be made between the value 
of decoctions and some other standard nutrient solutions. On 
corn meal decoction the growth was particularly unsatisfac- 
tory and irregular with Glomerella and Macrosporium. More- 
over, there was gradually deposited in all solutions of this 
decoction (more in the standardized solutions) a considerable 
flaky precipitate, and this interfered seriously with correct 
weight determinations of the mycelium formed, as may be in- 
ferred from an examination of table т. 
Filter papers 9 cm. in diameter were dried to constant 
Fig. 1. Graphs showing dry weights of cultures of Aspergillus niger; dry 
weights = felt plotted on ordinates, the solutions (see p. 166 for explanation) 
on abscis 
