RELATION BETWEEN VEGETATIVE VIGOR AND REPRODUCTION 55 1 
following discussion the record of these two will be disregarded as 
being probably too greatly affected by the production of sporangia. 
Table X 
Series I. Saprolegnia ferax. Mycelia Out of Media Under Column 2, Transferred 
to 0.05 Percent Haemoglobin; Sugars and Salts i/ioo Molecular Except as 
Noted. Weight in Milligrams of Mycelia Out of 50 cc. Liquid. 
Record of Sporangia and Oogonia Produced. Figures for 
Number of Oogonia to Nearest Whole Number 
Weight, 
7 Days. 
Weight, 
48 Days. 
Spo- 
rangiain 
Water, 
yHrs. 
Sporangia 
in Water, 
24 Hrs. 
Sporangia, 
Haemoglobin, 
3 Days. 
Pea. 
Peptone 0.1% 
0.2% 
0.5% 
1% 
0,1%, sucrose 
0.1%, maltose 
0.1%, sucrose 
and salts 
0.1%, maltose 
and salts 
0.2%, sucrose 
0.2%, maltose 
0.2%, sucrose 
and salts 
0.2%, maltose 
and salts 
0.1%, salts. . . 
0.2%, " ... 
0.2%, " 
1/333 mole- 
cular 
0.018 
0.002 
0.003 
0.004 
0.0036 
0.0035 
0.0044 
0.0054 
0.004 
0.0054 
0.005 
0.006 
0.005 
0.002 
0.0023 
0.003 
0.056 
0.005 
O.OII 
0.037 
0.007 
0.033 
0.010 
0.033 
0.013 
0.036 
0.044 
0.0066 
0.007 
III 
II 
I-II 
11+ 
I-II 
o-I 
II 
O-I 
I 
O-I 
O-I 
Few 
Few 
o 
Few 
III 
II-III 
II 
II-III 
II-III 
1 + 
II-III 
1 + 
II-III 
II 
II 
I-II 
II-III 
I-II 
I-II 
I-II 
III, oogonia 
started 
1 + 
1 + 
I-II 
II-III 
o, oogonia 
started 
I 
I-II 
o-I 
o-I 
II 
I-II 
I 
I 
If these records are arranged in two groups, the first containing 
those in which 16-36 oogonia were found in 25 square millimeters, 
and the other those with 41-53 oogonia per square it will be noted 
that the first group contains those culture media without sugar, except 
for numbers 6 and 7, in which sugar was used. The second group 
includes all those with sugar except 6 and 7 and also one (12) to which 
no sugar was added. See Table XI. 
The weights for the seven-day-old mycelia are, as a rule, higher 
in the second than in the first group and this is even more striking 
