Cuap. IX. VAPOUR OF ETHER. 219 
moved for the next 40 m. Nevertheless, in 1 hr. 45 m. from the 
time when the bits of meat had been given, all the tentacles 
reached the centre. In this case some slight anesthetic effect 
apparently had been produced. On the following day the plant 
had perfectly recovered. 
Another plant bearing two leaves was exposed for 2 m. under 
the 19-0z. vessel to two drops of chloroform; it was then taken 
out and examined; again exposed for 2 m. to two drops; 
taken out, and re-exposed for 3 m. to three drops; so that 
altogether it was exposed alternately to the air and during 
7 m. to the vapour of seven drops of chloroform. Bits of meat 
were now placed on thirteen glands on the two leaves. On one 
of these leaves, a single tentacle first began moving in 40 m., 
and two others in 54 m. On the second leaf some tentacles 
first moved in lhr.11m. After 2 hrs. many tentacles on both 
leaves were inflected ; but none had reached the centre within 
this time. In this case there could not be the least doubt that 
the chloroform had exerted an anesthetic influence on the 
leaves. 
On the other hand, another plant was exposed under the same 
vessel for a much longer time, viz. 20 m., to twice as much 
chloroform. Bits of meat were then placed on the glands of 
many tentacles, and all of them, with a single exception, reached 
the centre in from 18 m. to 14m. In this case, little or no 
anesthetic effect had been produced; and how to reconcile 
these discordant results, I know not. 
Vapour of Sulphuric Lther—A plant was exposed for 30 m. to 
thirty minims of this ether in a vessel holding 19 oz.; and bits 
of raw meat were afterwards placed on many glands which had 
become pale-coloured ; but none of the tentacles moved. After 
6 hrs. 80 m. the leaves appeared sickly, and the discal glands 
were almost dry. By the next morning many of the tentacles 
were dead, as were all those on which meat had been placed; 
showing that matter had been absorbed from the meat which 
had increased the evil effects of the vapour. After four days 
the plant itself died. Another plant was exposed in the same 
vessel for 15 m. to forty minims. One young, small, and 
tender leaf had all its tentacles inflected, and seemed much 
injured. Bits of raw meat were placed on several glands on 
two other and older leaves. These glands became dry after 
6 hrs., and seemed injured ; the tentacles never moved, except- 
ing one which was ultimately a little inflected. The glands of 
the other tentacles continued to secrete, and appeared uninjured, 
tut the whole plant after three days became very sickly. 
