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Scientific Memoirs by

TABLE II.—Showing Results of section of Distal Pinnules on mornings
after a fall of Rain
—continued.

No. of
Experi-
ment.
Result.
11 Slow, spreading, complete action in the cut pinna; action in the primary pulvinus,
and full depression; slow, incomplete action in two other pinnæ; long pause;
very incomplete action in the base of the remaining pinna.
12 Tip of one pinnule only cut .—Action in that pair of pinnules; pause; action in the
primary pulvinus, but depression only partial due to mechanical obstruction;
pause; centripetal action in the outer half of the cut pinna; no futher result.
13 Action in the cut pinnules; long pause; very slow but almost complete action in
that pinna; no further result; primary pulvinus readily responsive to direct
impulse.
14 Results as in the previous case. After an interval, but before the first pinna had
completely recovered, the distal pinnules of the other pinna (a two-pinnaed
leaf) cut with the following results:—Pause; action in the primary pulvinus,
and full depression; complete action in that pinna; no further result.
15 Action in the cut pinnules; action in the primary pulvinus, and full depression;
complete centripetal action in the cut pinna; no further result.
16 Action in the cut pinnules; pause; action in the primary pulvinus, but depression
incomplete due to mechanical obstruction; pause; complete, centripetal action
in the cut pinna; no further results.
17 Pause; slow, spreading action in that pinna; pause; action in the primary pul-
vinus, and extreme depression; spreading centrifugal action in two other
pinnæ, complete almost to the tips; no further result.
18 Action in the cut pinnules; pause; slow, centripetal action in the cut pinna;
pause; conspicuous action in its secondary pulvinus; pause; action in the
primary pulvinus, and almost full depression; imperfect centrifugal action
almost to the tip of the other distal pinna; pause; slow, incomplete action in
the base of the proximal pinna of the same side of the leaf as the cut pinna;
no further result.
19 Long pause; very slow action in the cut pinnules; very slow, centripetal action
in the distal half of the cut pinna; action in the primary pulvinus, but incom-
plete depression due to obstruction; pause; action of all the remaining pin-
nules on one side of the cut pinna save the two basal ones; no action in the
six lowest pinnules of the other side; no further result.
20 Action in the cut pinnules; pause; rapid, complete centripetal action throughout
the cut pinna; no further result. After an interval, and when the first pinna
had fully expanded in its basal half, the tip of the pinnules of the other distal
pinna were cut with the following results:—Action in the cut pinnules; pause;
action in the primary pulvinus and full depression; pause; complete, centri-
petal action in the second pinna; pause; almost complete, centrifugal action
in the expanded, basal portion of the first pinna; no further result.

     The results of the experiments detailed in the present table are specially

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