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Medical Officers of the Army of India .

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significant when compared with those in the succeeding one. There is a general
resemblance in the phenomena in both, just as there was a general resemblance
in the conditions to which the plants were subject at the time of experiment.
There are at the same time differences in details of action corresponding with
details in the external conditions. When the experiments included in Table III
were carried out, the amount of soil moisture and of water on the leaves was
much greater than when those of the present table were conducted, and coincid-
ing with this we find indications of diminished tendency to; extension of action,
and increased tendency to early action in the primary pulvinus. This will
appear more clearly if the results in these respects are tabulated alone:—

Table II.—20 experiments.

Action extending to other pinnae in 10 cases.

Premature action in the primary pulvinus in 8 cases.

Table III.—10 experiments.

Action extending to other pinnæ in 4 cases.

Premature action in the primary pulvinus in 7. cases.

The conditions present in the experiments of Table III implied greater
supply of moisture and greater mechanical strain on the primary pulvinus than
those present in the experiments of Table II, and these were accompanied by
more localised action and a greater tendency to premature action in the primary
pulvinus:

TABLE III.—Showing Results of section of Distal Pinnules after a continuous
period of heavy Rainfall .

No. of Experi- ment.	Result.
	The experiments detailed in this table were conducted between 8 and 9 A.M. of the 30th March after a night of continued heavy rain. The morning was very cloudy, so that the brake of the plant had not been exposed to direct sunshine. No rain was falling at the time, but the leaves, which were widely expanded, were, as a rule, heavily loaded with drops of water. All the leaves experi- mented with were fully developed but young ones, with four pinnæ .
1	Action in the cut pinnules; pause; action in the primary pulvinus; long pause; very slow, partial action to near the base of the cut pinna; no further result.
2	Action in the cut pinnules; long pause; very slow and partial, centripetal action in the cut pinna in its outer three-fourths; action in the primary pulvinus, but depression mechanically partially obstructed; pause; centripetal, imperfect ac- tion in the pinnules of one side of the basal fourth of the cut pinna: no fur- ther result.