acts slowly.
Antimony, Tartrate of. Three leaves were immersed in ninety minims of a
solution of one part to 437 of water. After 8 hrs. 30 m. there was
slight inflection; after 24 hrs. two of the leaves were closely, and
the third moderately, inflected; glands not much darkened. The leaves
were washed and placed in water, but they remained in the same state
for 48 additional hours. This salt is probably poisonous, but acts
slowly.
Arsenious Acid. A solution of one part to 437 of water; three leaves
were immersed in ninety minims; in 25 m. considerable inflection; in 1
h. great inflection; glands not discoloured. After 6 hrs. the leaves
were transferred to water; next morning they looked fresh, but after
four days were pale-coloured, had not re-expanded, and were evidently
dead.
Iron, Chloride of. Three leaves were immersed in ninety minims of a
solution of one part to 437 of water; in 8 hrs. no inflection; but
after 24 hrs. considerable inflection; glands blackened; fluid coloured
yellow, with floating flocculent particles of oxide of iron. The leaves
were then placed in water; after 48 hrs. they had re-expanded a very
little, but I think were killed; glands excessively black.
Chromic Acid. One part to 437 of water; three leaves were immersed in
ninety minims; in 30 m. some, and in 1 hr. considerable, inflection;
after 2 hrs. all the tentacles closely inflected, with the glands
discoloured. Placed in water, next day leaves quite discoloured and
evidently killed.
Manganese, Chloride of. Three leaves immersed in ninety minims of a
solution of one part to 437 of water; after 22 hrs. no more inflection
than often occurs in water; glands not blackened. The leaves were then
placed in the usual solution of phosphate of ammonia, but no inflection
was caused even after 48 hrs.
Copper, Chloride of. Three leaves immersed in ninety minims [page 186]
of a solution of one part to 437 of water; after 2 hrs. some
inflection; after 3 hrs. 45 m. tentacles closely inflected, with the
glands blackened. After 22 hrs. still closely inflected, and the leaves
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