3 : 5 m. : 6 m. 30 s. slight inflection; 7 m. 30 s. plain inflection. :
11 m. 30 s.
4 : 4 m. 30 s. : 2 m. 30 s. a trace of inflection; 3 m. plain; 4 m.
strongly marked. : 7 m.
5 : 4 m. : 2 m. 30 s. a trace of inflection; 3 m. plain inflection. : 6
m. 30 s.
6 : 4 m. : 2 m. 30 s. decided inflection; 3 m. 30 s. strongly marked. :
6 m. 30 s.
7 : 4 m. : 2 m. 30 s. slight inflection; 3 m. plain; 4 m. well marked.
: 6 m. 30 s.
8 : 3 m. : 2 m. trace of inflection; 3 m. considerable, 6 m. strong
inflection. : 5 m.
9 : 3 m. : 2 m. trace of inflection; 3 m. considerable, 6 m. strong
inflection. : 5 m.
Other leaves were left in the solution without being brushed; one of
these first showed a trace of inflection after 11 m.; a second after 12
m.; five were not inflected until 15 m. had [page 211] elapsed, and two
not until a few minutes later. On the other hand, it will be seen in
the right-hand column of the table that most of the leaves subjected to
the solution, and which were brushed, became inflected in a much
shorter time. The movement of the tentacles of some of these leaves was
so rapid that it could be plainly seen through a very weak lens.
Two or three other experiments are worth giving. A large old leaf,
after being immersed for 10 m. in the solution, did not appear likely
to be soon inflected; so I brushed it, and in 2 m. it began to move,
and in 3 m. was completely shut. Another leaf, after an immersion of 15
m., showed no signs of inflection, so was brushed, and in 4 m. was
grandly inflected. A third leaf, after an immersion of 17 m., likewise
showed no signs of inflection; it was then brushed, but did not move
for 1 hr.; so that here was a failure. It was again brushed, and now in
9 m. a few tentacles became inflected; the failure therefore was not
complete.
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