202 Cuar. IX. 
DROSERA ROTUNDIFOLIA. 
had become aggregated into reticulated dingy-coloured masses, 
having rounded and angular interspaces. As I have never 
seen this effect produced by the carbonate of ammonia alone, 
it must be attributed to the previous action of the quinine. 
These reticulated masses were watched for some time, but did 
not change their forms; so that the protoplasm no doubt had 
been killed by the combined action of the two salts, though 
exposed to them for only a short time. 
Another leaf, after an immersion for 24 hrs. in the quinine 
solution, became somewhat flaccid, and the protoplasm in all 
the cells was aggregated. Many of the aggregated masses were 
discoloured, and presented a granular appearance; they were 
spherical, or elongated, or still more commonly consisted of 
little curved chains of small globules. None of these masses 
exhibited the least movement, and no doubt were all dead. 
Half-minims of the solution were placed on the discs of six 
leaves; after 23 hrs. one had all its tentacles, two had a few, 
and the others none inflected; so that the discal glands, when 
irritated by this salt, do not transmit any strong motor impulse 
to the outer tentacles. After 48 hrs. the glands on the discs of 
all six leaves were evidently much injured or quite killed. It is 
clear that this salt is highly poisonous.* 
Acetate of Quinine.—Four leaves were immersed, each in thirty 
minims of a solution of one part to 437 of water. The solution 
was tested with litmus paper, and was not acid. After only 
10 m. all four leaves were greatly, and after 6 hrs. immensely, 
inflected. They were then left in water for 60 hrs., but never 
re-expanded ; the glands were white, and the leaves evidently 
dead. This salt ig far more efficient than the sulphate in 
causing inflection, and, like that salt, is highly poisonous. 
Nitrate of Quinine.—Four leaves were immersed, each in thirty 
minims of a solution of one part to 437 of water. After 6 hrs. 
there was hardly a trace of inflection; after 22 hrs. three of the 
leaves were moderately, and the fourth slightly inflected; so 
that this salt induces, though rather slowly, well-marked inflec- 
tion. These leaves, on being left in water for 48 hrs., almost 
* Binz found several years ago 
(us stated in ‘The Journal of 
Anatomy and Phys.’ November 
1872, p. 195) that quinia is an 
energetic poison to low vege- 
table and animal organisms. Even 
ove part added to 4000 parts of 
blood arrests the movements of the 
white corpuscles, which become 
“rounded and granular.” In the 
tentacles of Drosera the aggre- 
gated masses of protoplasm, which 
appeared killed by the quinine, 
likewise preset.ted a granular 
appearance. A similar appear- 
ance is caused by very hot water 
