(6

(Dripping)

The Sept 11th the leaf of the old plants on which drops formerly fell does not seem in the least injured.

Oxalis sensitiva. — Young plant— a sound full grown leaf resting on inclined pad of cotton wool. Exposed Aug. 23d 10˚ 30' a.m to drip at height of 30 inches. — It was found impossible to keep drops on exactly same leaflet — Today 25th at noon a leaflets, on which I believe drops had not fallen for much above 24 hrs was infiltrated on margin — (Moved plant 25 at noon so that drops fell (noon 25th) on right-side almost terminal leaflet.

27th 7˚. 30' a.m infiltrated, marked leaf with yellow wool —

Aug 29th. Although both these leaflets were infiltrated, yet today no brown specks, seem to have recovered perfectly. —

So same leaf (Aug. 29th) but different leaflet put under drip at 12˚40' 2˚. 50' P.m, fall. 38 inches

(Aug 31. Noon 12˚. this leaflet, (right-hand one viewed from apex) now badly infiltrated fully half of leaflet; so changed drip to left-hand terminal leaflet.

(Sept I. 7˚ 30' a. m. This left-hand leaflet somewhat infiltrated & the same fact clear at 11˚ 45')

Sept I. 4˚ 45' P.m, both these 2 terminal leaflets now show no infiltration!!!!

(Sept 2d Both 7˚ 30' a.m. Both terminal leaflets again largely in-

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filtrated.

(Sept 2d. 7˚ 30' a.m made the drip fall on leaflet on opposite side)

Sept 2d at 12˚ 15' found that the infiltration had disappeared, so that these same 2 terminal leaflets were again placed under the drip.)

Sept 3rd 7˚ 30' a.m, these 2 leaflets greatly infiltrated like bits of glass; left them under drip.

Removed theM from under drip at 12˚ 4' (yellow wool) greatly infiltrated almost whole leaflets; but after only 46' infiltration greatly reduced, & after 2 hr (from commencement, leaflets perfectly green & not in the least injured, seem fitted to live under water or under a cascade! The leaves besides sleeping, are strongly paraheliotropic & bend down, & I suppose the stimulus from a touch act without any good being derived from it. These leaves are not protected by bloom, so no exception to my rule that leaves with bloom which move more injured by water — [illeg] exception in genus Oxalis.

(Sept 5th a brown patch at end of one of these 2 leaflets.)

Sept 10th small brown specks on the other terminal leaflets, so slightly injured.