132 DROSERA ROTUNDIFOLIA. (Cuar. VIT. 
most of them closely; after 1 hr. blade slightly inflected ; after 9 hrs,: 
30 m. began to re-expand. 
(2) After 33 m. all the outer tentacles but twenty-five inflected, and 
blade slightly so; after 1 hr. 30 m. blade strongly inflected and 
remained so for 24 hrs.; but some of the tentacles had then re- 
expanded. 
(3) After 1 hr. all but twelve tentacles inflected; after 2 hrs. 30 m. 
all but nine inflected ; and of the inflected tentacles all excepting four 
closely ; blade slightly inflected. After 8 hrs. blade quite doubled up, 
and now all the tentacles excepting eight closely inflected. The leaf 
remained in this state for two days. 
(4) After 2 hrs. 20 m. only fifty-nine tentacles inflected; but after, 
5 hrs. all the tentacles closely inflected excepting two which were not 
affected, and eleven which were only sub-inflected ; after 7 hrs. blade 
considerably inflected ; after 12 hrs. much re-expansion. 
(5) After 4 hrs. all the tentacles but fourteen inflected ; after 9 hrs. 
30 m. beginning to re-expand. 
(6) After 1 hr. thirty-six tentacles inflected; after 5 hrs. all but 
fifty-four inflected; after 12 hrs. considerable re-expansion. 
(7) After 4 hrs. 30 m. only thirty-five tentacles inflected or sub- 
inflected, and this small amount of intlection never increased. 
Now for the seven corresponding leaves in water :— 
(1) After 4 hrs, thirty-eight tentacles inflected ; but after 7 hrs. 
these, with the exception of six, re-expanded. 
(2) After 4 hrs. 20 m. twenty inflected; these after 9 hrs. partially 
re-expanded. 
(3) After 4 hrs. five inflected, which began to re-expand after 7 hrs. 
(4) After 24 hrs. one inflected. 
(5), (6) and (7) Not at all affected, though observed for 24 hrs., 
excepting the short tentacles on. the borders of the disc, which as usual 
formed a ring. 
A comparison of the leaves in the solution, especially of the first 
five or even six on the list, with those in the water, after 1 hr. or after 
4 hrs., and in a still more marked degree after 7 hrs. or 8 hrs., could 
not leave the least doubt that the solution had produced a great effect. 
This was shown, not only by the vastly greater number of inflected 
tentacles, but by the degree or closeness of their inflection, and by that. 
of their blades. Yet each gland on leaf No. 1 (which bore 255 glands, 
all of which, excepting five, were inflected in 80 m.) could not have 
received more than one-four-millionth of a grain (-0000162 mg.) of 
the salt. Again, each gland on leat No. 3 (which bore 233 glands, all 
of which, except nine, were inflected in 2 hrs. 80 m.) could have 
received at most only the szghoqq of a grain, or ‘0000181 mg. 
Four leaves were immersed as before in a solution of one part to 
656,250 of water (1 gr. to 1500 0z.); but on this occasion 1 happened 
to select leaves which were very little sensitive, as on other occasions. 
I chanced to select unusually sensitive leaves. The leaves were not 
