1921] 
WEBB—GERMINATION OF SPORES OF CERTAIN FUNGI 207 
drop, involving usually from 50 to 100 spores, and the average 
percentage of germination recorded. Readings were made with 
each set of cultures at two different incubation periods, and a 
third one would have been made had not luxuriant mycelial 
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Fig. 3. Botrytis cinerea in 2 per cent bacto-peptone solution. 
growth in the nutrient solutions prevented. Values obtained 
from the second reading are considered as reliable as those that 
might have been obtained from a third reading; in fact, data 
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Fig. 4. Botrytis cinerea in Czapek's full nutrient solution. 
which were accumulated in the preliminary study with incubation 
periods as denoted by second and third readings showed close 
agreement, indicating, therefore, that germination was sufficiently 
and satisfactorily completed at this period. As might be ex- 
