CHAP. IX. VArOUR OF ETHEll. 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 anaesthetic 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-oz. vessel to two drops of chloroform ; it was then taken 

 out and examined; again exposed for 2m. 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 

 tirst moved in 1 hr. 11 m. 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 anaesthetic 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 13 m. to 14 m. In this case, little or no 

 anaesthetic effect had been produced ; and how to reconcile 

 these discordant results, I know not. 



Vapour of Sulphuric Ether. 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. 30 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, 

 out the whole plant after three days became very sickly. 



