[2]

April 16th 1878 Desmodium gyrans

The you seedlings about which it has been said that the 11th leaf bore a single lateral leaflet.— (on another plant the 7th did so) This Total length of Petiole, main one .75 of inch

Length of petiole between sub-petiole of lateral leaflet the lateral leaflet & main leaflet.

A —.2 [sketch]

Length of sub-petiole .11 of inch

— of whole of lat. leaflet .35

The plant was brought into study & placed under Bell glass when temp. was only 67° Fah, being warmed by mortar & the leaflet was in much rapid movement, for course traced on bell-glass & both ascended & descended up & down so as to form 2 & 1/2 ellipses in 10' — It moved towards main leaf passing sometimes under it & sometimes over it.— In the afternoon mortar removed & temp was very steady at 64° Fah. & yet it moved rapidly & to great extent, with some jerking movement, but the jerks, not so conspicuous as course in Hot-House. The jerks were

[2v]

N. B at 10° P.m I saw a jerk as leaflet descended.

[2b]

always downwards so that case very very like Averrhoa— The main leaflet was not in much very rapid movement, but was moving. The main petiole close beneath sub-petiole of the little leaflet secured to stick in soil was secured to stick, so that the movements observed were strictly those of the rudimentary leaflet.—

Took plant into my bed-room at 11° P.m moving rapidly Temp 62° — at 1° a.m in middle of night had risen greatly & was still moving rapidly Temp 62°; by 3° 30' a.m. had fallen greatly Temp. 62° at 6° 30' Temp 61° was still lower; at 6° 45' still lower, (whilst the main leaflet were all rising & waking) at 7° 40' had risen much, at 8° 30' was moving rapidly.—

We may conclude does not sleep, but is in motion all night— it is very remarkable the lowness of Temp. at which movement goes on.

(over)

[2bv]

The next leaf developed (12th leaf above Cots had no lateral leaflet— The next (13th) had a single one developed.

(June 15' 1878 at last a leaf has appeared bearing the 2 rudimentary leaflets, between this & the first leaf which bore any there are 9 leaves; of this 9, 5 have a single leaflet, & 4 have none.)