in water, there was
practically a total abolition of all response in those anaesthetised or
poisoned.

#Experiments on the effect of anaesthetics and poisons.# A batch of ten
leaf-stalks of plane-tree was placed with the cut ends in water, and
leaves in air; an equal number was immersed in chloroform-water; a third
batch was placed in 5 per cent. solution of mercuric chloride.

Similarly a batch of three horse-chestnut leaf-stalks was put in water,
another batch in chloroform-water, and a third batch in mercuric
chloride solution.

I. LEAF-STALK OF PLANE-TREE

The stimulus applied was a single vibration of 90 deg..

A. After 24 hours in | B. After 24 hours in | C. After 24 hours in
water | chloroform water | mercuric chloride
| |
[All leaves standing up | [Leaves began to | [Leaves began to droop
and fresh--aphides | droop in 1 hour | in 4 hours. Deep
alive] | and bent over in | discolouration along
| 3 hours--aphides | the veins. Aphides
| dead] | dead]
| |
Electric | Electric | Electric
Response | response | response
(1) 21 dns. | (1) 1 dn. | (1) 0 dn.
(2) 31 " | (2) 1 " | (2) .25 "
(3) 26 " | (3) 2 " | (3) .25 "
(4) 15 " | (4) 0 " | (4) 0 "
(5) 17 " | (5) 1 " | (5) .25 "
(6) 23 " | (6) 1.5 " | (6) .25 "
(7) 30 " | (7) 2 " | (7) 0 "
(8) 27 " | (8) 1 " | (8) .25 "
(9) 29 " | (9) 1 " | (9) .25 "
(10) 17 " | (10) .5 " | (10) .5 "
------------------------+----------------------+-----------------------
Mean response 23.6 | Mean 1 | Mean .15

II. LEAF-STALK OF HORSE-CHESTNUT

(1) 15 dns. | (1) .5 dn. | (1) 0 dn.
(2) 17 " | (2) .5 " | (2) 0 "
(3) 10 " | (3) 0 " | (3) 0 "
----------------