550 
ADRIAN J. PIETERS 
In Table IX another record is given to show that there is sub- 
stantial agreement between the number of oogonia found on mycelia 
from like origin and that mycelia grown in different media may vary 
in their capacity to produce oogonia. It is not urged that the figures 
obtained have the value of those commonly secured in a seed test, 
for example, for there are too many unknown and uncontrollable 
factors ; but they are offered as a more exact statement of the relative 
number of oogonia produced on various mycelia of a given series 
than could be made in any other way. 
Table IX 
5. ferax. Part of Record from Set I Showing Agreement Between Count and Cross 
Count. Mycelia in 0.05 Percent Haemoglobin. Temperature i6°-i8° C. 
Figures to Nearest Whole Number 
Average 
Pea 
Peptone 1% 
" 1% duplicate 
Peptone 0.5% 
Peptone 0.2% 
" 0.2% duplicate 
Peptone 0.1% 
" + sucrose 
" + maltose 
" + sucrose + salts 
Peptone + maltose + salts 
Peptone 0.2% + sucrose 
" 0.2% + maltose 
0.2% + " + salts 
" 0.1% -j- salts 
" 0.2%+ " 
40 
37 
43 
36 
27 
26 
16 
19 
43 
27 
44 
55 
45 
64 
32 
32 
44 
31 
45 
32 
34 
23 
16 
17 
38 
28 
40 
52 
50 
47 
33 
38 
42 
34 
44 
34 
31 
25 
16 
18 
41 
28 
42 
54 
48 
56 
33 
36 
Record of Series I, October, 1914. — For this experiment the food 
solutions were contained in tubes each holding 50 cc. of liquid. These 
were inoculated and allowed to grow for seven days and transferred 
to 0.05 percent haemoglobin October i, 1914. At the time the 
mycelium from one tube was transferred to haemoglobin, that from a 
duplicate was washed, dried and weighed, and a third tube was left 
for forty-eight days and the contents then washed, dried and weighed. 
Table X gives the complete record of this test. Unfortunately a 
rather large number of sporangia were produced in the haemoglobin, 
especially by the mycelium from pea and from peptone i percent and 
this interferred materially with the production of oogonia. In the 
