Cuar, IX. VAPOUR OF GHLOROFORM. 217 
Nor did these four leaves, on being left for 24 hrs. in the diluted 
alcohol, undergo any inflection. They were then removed; one 
being placed in an infusion of raw meat, and bits of meat on 
the discs of the other three, with their stalks in water. Next 
day one seemed a little injured, whilst two others showed merely 
a trace of inflection. We must, however, bear in mind that 
immersion for 24 hrs. in water prevents leaves from clasping 
meat. Hence alcohol of the above strength is not poisonous, nor 
does it stimulate the leaves like camphor does. 
The vapour of alcohol acts differently. A plant having three 
good leaves was left for 25 m. under a receiver holding 19 oz. 
with sixty minims of alcohol in a watch-glass. No movement 
ensued, but some few of the glands were blackened and 
surivelled, whilst many became quite pale. These were scattered 
over all the leaves in the most irregular manner, reminding me 
of the manner in which the glands were affected by the vapour 
of carbonate of ammonia. Immediately on the removal of the 
receiver particles of raw meat were placed on many of the glands, 
those which retained their proper colour being chiefly selected. 
But not a single tentacle was inflected during the next 4 hrs. 
After the first 2 hrs. the glands on all the tentacles began to 
dry; and next morning, after 22 hrs., all three leaves appeared 
almost dead, with their glands dry; the tentacles on one leaf 
alone being partially inflected. 
A second plant was left for only 5 m. with some alcohol in a 
watch-glass, under a 12-oz. receiver, and particles of meat were 
then placed on the glands of several tentacles. After 10 m. 
some of them began to curve inwards, and after 55 m. nearly 
all were considerably inflected; but afew did not move. Some 
anesthethic effect is here probable, but by no means certain. 
A third plant was also left for 5 m. under the same small vessel, 
with its whole inner surface wetted with about a dozen drops of 
alcohol. Particles of meat were now placed on the glands of 
several tentacles, some of which first began to move in 25 m.; 
after 40 m. most of them were somewhat inflected, and after 
1 hr. 10 m. almost all were considerably inflected. From their 
slow rate of movement there can be no doubt that the glands of 
these tentacles had been rendered insensible for a time by 
exposure during 5 m. to the vapour of alcohol. 
Vapour of Chloroform.—The action of this vapour on Drosera 
is very variable, depending, I suppose, on the constitution or age 
of the plant, or on some unknown condition. It sometimes 
eauses the tentacles to move with extraordinary rapidity, and 
sometimes produces no such effect. The glands are sometimes 
