RECORD OF THE EXPERIMENTS. 93 
EXPERIMENT 3. 
Experiment 3 embraced a series of 14 solutions, of which 11 were of 
M 10 
5,000 and graded by tenths from 10 
Meg(NO,), to 5 Ca(NO,),. Duration of cultures, 7 days; tempera- 
equivalent concentration at 
ture 22° at the beginning and at the end. 
TaBLE II1.—Statement of results, experiment 3. 
| 
No. of culture .... 1 2 3 4 5 6 . 
Composition ..... 1 Mg. 10Mg. |9Mg+1Ca.|8Mg+2Ca. | 7 Mg+3Ca.| 6 Mg+4Ca.| 5Mg+5Ca. 
Concentration: 
; 10M 10M 10M 10 M 10M 10M 10M 
| Before growth.| 599 000 50, 000 50, 000 50, 000 50, 000 50, 000 50, 000 
\ 
- 9M 9M 7M 8M 6M 6M 5M 
After growth.) 559 000 50, 000 50, 000 50, 000 50, 000 50, 000 50, 000 
No. of culture .-.-.. 8 9 10 11 12 13 14 
Composition -..-.-.- 4Mg+6Ca. | 3 Mg+7 Ca. | 2Mg+8Ca.| 1 Mg+9 Ca. 10 Ca. 1 Ca. a 
Concentration: 
10M 10M 10 M 10M 10M 10M 
Beforegrowth-| 59 000 50, 000 50, 000 50, 000 50, 000 500, 000 0 
6M 5.5 M 6.5M 6M 7M 10M 8M 
After growth-| 59 000 50, 000 | 50, 000 50, 000 50, 000 500, 000 500, 000 
Tare 
5000 
E 
r 
* : 
231 Fig, 11,—Seedlings of culture 2, experiment 3. 
Mg (N03)2 
