STIMULATION ON TURGESCENT VEGETABLE TISSUES. 17 
Exp. 13. —Aug. 5,1886. Jerusalem-Artichoke pith ; auxano- 
meter-lever. 
Times of « »| Times of « „ 
observation. Rate of “ growth. observation. Rate of “ growth. 
AM. A.M. 
10.15  ......... In 270 c. c. water. 1 c. c. chloroform, 
10.35  ......... 76 ‘37 per cent 
10.4  ........ 75 10.11 are. 24 
10.6 ........ Water siphoned | 10.1333 ......... 21 
out. 1c. c. chloroform, 
In air. . "[4- per cent. 
10.88  ......... 33 10.175 ........ — 83 (shortened). 
10.19  ......... —18 » 
Exp. 14.—Aug. 5, 1886. Sunflower-pith, with auxanometer. 
Times of « „|| Times of “ » 
observation. Rate of “ growth. observation. Rate of “growth. 
A.M, A.M. 
In water (370 c.c.). 3-4 drops of chloroform. 
1049 . ....... 178 10.56 — ......... 47 
192 10.57  ......... 45 
178 10.58:5  ......... 33 
10.505 ......... 151 10.595 ......... 4 drops of chlo- 
Water siphoned form. 
out. ILIO  ....... 26 
In air. 2 c. c. chloroform. 
10.528 ......... 67 Stationary. 
10.54.  ......... 41 ILILO ........ Began to contract. 
—16 (shortened). 
Exp. 15.—Aug. 23, 1886. Auxanometer ; Sunflower-pith. 
Times of observation. Rate of “ growth.” 
A.M. 
11.42 ............... In damp air. Jar of 4770 c. c. 
1143  .............. 46 
11.442  ............... 30 
1145 ............. '4 c. c. chloroform, ‘008 per cent. 
11465  .............. 12 
11.4.9 .............. Still growing. 
Another Method.—Small pieces of split stalk were observed with 
a microscope, as described under ether. By this method the 
results obtained with the auxanometer-lever were roughly con- 
firmed. A single drop or several drops of chloroform were 
added, and in no case was acceleration visible. "With higher 
strengths growth ceased, and the stalk began to uncurl. 
. 
4. Effect of Camphor. 
An aqueous solution of camphor, said to be O'l per cent., 
LINN. JOURN.—BOTANY, VOL. XXIV. c 
