STIMULATION ON TURGESCENT VEGETABLE TISSUES. 25 
ll. Effect of Quinine. 
Dilute aqueous solutions of quinine chloride were used, ranging 
between 0:15 and 0:834 per cent. 
In two cases 0°15 per-cent. and 0:2 per-cent. solutions pro- 
duced accelerations of 100: 110 and 100: 141. In the majority 
of cases, however, quinine had either no effect, or rapidly caused 
a contraction of the pith. In two cases with 0'3 per cent., in 
one with 0:34 per cent., and one with 0:15 per cent., no effect was 
produced. In four cases (0°42 per cent., 0°34 per cent., 0°15 
per cent., O'l per cent.) contraction was produced. The results 
are therefore of a doubtful character. 
Exp. 28.— Aug. 26, 1886. 
Times of observation. Rate of ** growth.” Temperature. 
A.M. . 
10.40 ..............-. Tap-water put in. 18 
238 " 
1048 . ............... 217 » 
1049 .  ................. 192 » 
10.495  .................. Siphoned out water. » 
10.502  .................- Quinine ‘34 per-cent. 17:5 
solution put in. 
166 » 
1052  ................ 138 " 
10.585  ............sss 44 » 
1056 . ............ 32 » 
Result: no effect. 
Exp. 29.—Aug. 26, 1886. Sunflower-pith ; lever. 
Times of observation. Rate of “ growth.” Temperature. 
A.M. . 
11.00 — ..........eee Tap-water put in. 18 
263 ” 
1193  . ...........— 256 » 
Siphoned out water. » 
11.25 — ............... Quinine 34 per-cent. 18:5 
solution. 
11.26 — esse 108 » 
11265  ................- 100 ” 
11272 ................ 68 " 
11.29 ..............—. Began to shorten. » 
1131 ...............- — 5 (contraction). » 
Flaccid. 
Result: retardation, followed in a few minutes by contraction 
and death. 
