1924] 
WOLPERT—FUNGI AND H-ION CONCENTRATION OF MEDIA 58 
All agar-plate cultures were examined every other day for 
evidence of growth and for clear zones in the agar, indicating 
utilization of the cellulose. 'The diametrie growth both of the 
mycelial colony and of the clear zone was recorded in milli- 
meters. Because of the impossibility of separating the mat from 
the cellulose and filter-paper, the weights of the fungus in solutions 
Pg | ! | | | | 
Еір.1. Lenzites sepiaria іп Richards’ solution. 
containing these materials were not determined. In these cases 
the amount of growth and the hydrolysis of the filter-paper were 
compared by definite scales. These will be discussed in the 
experimental data. 
As far as possible the work has been reported in the form of 
curves. The dry weights in mgs. are plotted as the ordinates, 
and the initial Ри as the abscissae. Unless otherwise stated, 
