356 
ROBERT AARON STEINBERG 
30. The comparative yield resulting from the addition of varying amounts of acid before 
inoculation and on the first day after inoculation. 
Strain W, ir 
H3P04/Flask I H3P04/Flask 
Added Before Inoculation 
Yield 
I Day 
Yield 
0 CC. 
0.204 g. 
O.I CC. 
0.332 g. 
0.2 
0.327 
0.2 
0.267 
0.3 
0.638 
0.3 
0.435 
0.4 
0.544 
0.4 
0.464 
0.5 
0.246 
0.5 
0.285 
0.6 
0.166 
0.6 
0.202 
0.7 
0.049 
0.7 
0.215 
0.8 
0.040 
0.8 
0.186 
H3P04/Flask 
Initial 
ist Day 
2 
Yield 
O.I CC. 
0.3 CC. 
0.1 cc. 
0.232 g. 
O.I 
0.3 
O.I 
0.302 
O.I 
0.2 
0.2 
0.199 
0.1 
0.2 
0.2 
0.351 
0.2 mg. Zn/L 0.985 g 
31. The comparative yield resulting from the addition of varying amounts of acid before 
inoculation and on the first, second, and third days after inoculation. 
Strain W, ii 
H3P04/Flask Added B 
efore 
H3/P04Flask Added 24 Hrs. After 
H3P04/Flask Added 48 Hrs. After 
Inocu 
lation 
Inoculation 
Inoculation 
0 CC. 
0.183 g. 
0.2 CC. 
0.290 g. 
0.2 CC 
0.241 g. 
0.2 
0.402 
0.3 
0.323 
0.3 
0.300 
0.3 
0.377 
0.4 
0.257 
0.4 
0.299 
0.4 
0.347 
0.5 
0.265 
0.5 
0.279 
0.5 
0.182 
0.6 
0.255 
0.6 
0.247 
0.6 
0.078 
H3P04/Flask Added 72 Hrs. Aft 
er Inoculation 
Mg. Zn/L 
Yield 
0.2 CC. 
0.244 g. 
0 
0.123 g. 
0.3 
0.325 
0.025 
0.339 
0.4 
0.274 
0.05 
0.378 
0.5 
0.310 
0.075 
0.447 
0.6 
0.215 
O.I 
0.540 
0.125 
0.724 
0.15 
0.755 
0.175 
0.872 
0.2 
0.909 
The cultures of the zinc series were prepared as usual, i.e., there was no 
* tube penetrating through the cotton plug of the flask. 
(Concluded in the November number.) 
