RELATION BETWEEN VEGETATIVE VIGOR AND REPRODUCTION 537 
eyepiece of a Leitz compound erecting body and the number of 
oogonia in a square, having an area of 25 square millimeters, was 
determined under a Leitz number two objective. The oogonia are, 
of course, not unifomdy distributed over the mycelium, and in order 
to find the average number, the oogonia in ten squares were counted, 
beginning at one edge and following a line across the mass. As a 
rule the oogonia are more numerous a little back from the edge than 
in the middle, but^this is not always the case. 
1 — 
0 
Q 
D 
0 
-i 
0 
0 
c 
c 
:) 
0 
H 
-J 
? 
r 
0 
-t 
r- 
c 
) 
0 
a 
0 
-i 
d- 
0 
c 
c. 
'c 
0 
0 
e 
-A 
0- 
h: 
0 
c. 
Fig. 2. Diagram showing the arrangement of the oogonia in one of the spaces. 
Magnified about 100 times. 
The diagrams, text figures i and 2, show the method of counting 
and Table I gives some counts showing the distribution of the oogonia 
on the mycelium. This matter will be referred to again. 
Table I 
Illustrating Method of Counting Oogonia. Each Number Represents the Oogonia in 
One Square of 25 Square Millimeters. Oogonia out of Haemoglobin 
0.075 Percent or Haemoglobin 0.05 Percent 
From Set III 
Peptone and levulose 40, 85, 63, 52, 81, 87, 144, 115, 82, 37 — Ave. 78.6 
Cross count 14,41,26,145,92,76, 76, 86,66,49 — " 67.1 
Duplicate 44, 80, 88, 72, 79» 85» 70, 76, 76, 85— " 75.8 
From pea 3, 10, 11, 12, 78, 76, 60, 61, 72, 37 — " 42.1 
Cross count 4, 8,13, 15,22,79,122, 97,37,27 — " 42.4 
Duplicate 6, 65, 89, 80, 57, 75, 66, 23, 13, 19— " 49.3 
