STIMULATION ON TURGESCENT VEGETABLE TISSUES. 
Exp. 21 (continued). 
Times of observation. 
Oder ercccerecscces 
Peer ecccrcnccccces 
Peer ecccccacccccce 
Cece ecccccncccccce 
Meccocttoítosocteon 
Result: retardation, then 
7. Effect of Hydrochloric Acid. 
Rate of “ growth." 
10 c. c. acetic acid 
(5°6 per cent.). 
39 
10 
Began to shorten, 
— 6 (contracts). 
21 
Temperature. 
e0 
175 
Continues to contract. » 
contraction. 
The percentages employed were 0:4 per cent, 05 per cent., 
2 per cent., and 4 per cent 
decided retardation. 
percentages, though less markedly. 
Effect of 0'4 
» 0:5 
» 2 
The effect of 0°5 per cent. was 
The same effect was obtained with the other 
per cent. = 100: 51 
» = 100: 30 
» = 100: 64 
In none of these cases was any stimulation of growth caused 
by hydrochloric acid ; neither was any contraction apparent with 
these percentages. 
Exp. 22.—Aug. 3,1886. Jerusalem-Artichoke pith; auxano- 
meter. 
Times of observation. Rate of “ growth.” 
P.M. 
59  ...2eeee 243 
222 
222 
Hydrochloric acid added 
(2:04 per cent.). 
5.00  .................. 114 
129 
129 
Result: retardation. 
Exp. 23.—Sept. 9, 1886. 
Times of observation. 
P.M. 
eee ocn 
wee eeccccccsvccves 
.................. 
ee*escocssocoscocc 
.................. 
Seeceresscecrecces 
PERLLITTIILEITERTT 
...........n...... 
Result: retardation. 
Jerusalem-Artichoke pith; lever. 
Rate of “ growth.” 
Tap-water put in. 
500 
400 
357 
125 
123 
Siphoned out water. 
‘5 per cent. hydrochloric 
acid put in. 
Temperature. 
C. 
16 
16-5 
