STIMULATION ON TURGESCENT VEGETABLE TISSUES. 
Exp. 25.—Sept. 10, 1886. 
Times of observation. 
A.M. 
III 
Da cocto 
eacceovosessesosess 
EEETETEETITEEETET 
ree ere 
.......000....... 
Peer cccceaccecces 
Pew ccercccnceccces 
Preece ccereccesces 
23 
Jerusalem-Artichoke pith; lever. 
Rate of “ growth” Temperature, 
°C, 
Tap-water put in. 16 
166 ` » 
153 » 
181 » 
192 » 
181 » 
200 ” 
161 l » 
147 » 
Siphoned out tap-water. __,, 
3 per cent. carbolic acid 18 
(aq. sol.) put in. 
—47 (5 millim.) (con-  ,, 
traction). 
— 248 (contraction). " 
Flaccid. » 
Result: almost instantaneous contraction. 
10. Effect of Hydrocyanic Acid. 
The effect of prussic acid is very striking. Itdid not produce 
a contraction such as is caused by carbolic acid, and such as might 
have been expected, but either a temporary acceleration (com- 
parable to the effect of alcohol), or else a remarkably steady high 
rate of growth continued for a prolonged period. Weak solutions 
were obtained by diluting the pharmacopeial preparation, which 
contains 2 per cent. of the acid. 
Exp. 26.—Aug. 24, 1886. Sunflower-pith ; lever. 
Times of “ ” 
observation. Rate of “ growth. 
A.M. 
11.48 ............ 370 c. c. water. 
11.54 ............ 52 
11.56 ............ 59 
11.57 ........... 54 
1159 ........... 52 
11.595 Prussic acid, 3 c. c. put 
in, 0:8 per cent. 
121  ........... 42 
45 
1225 ............ 46 
44 
41 
44 
126  ..........- 39 
Times of « » 
observation. Rate of “growth. 
A.M. 
1213 ............ 34 
Siphoned out 
eolution. 
1215 ............ 1-4 per cent 
prussic acid 
12.16:5 ............ 40 
36 
1218 ............ 37 
37 
1220 ............ 38 
37 
1229 ........... 41 
12.8855 ............ 37 
1252 . 30 
