(1

Acacia Farnesiana

Sept 7th 1877.

[Annotated diagram]

Stem

viewed from vertically above

137º

75º angle — I might show position during sleep by broken lint

transverse

135º

100

64º

Full 8º grown, but simple leaf.,—but with only 3 pair of pinnæ

The unbroken lines show position of pinnæ  as seen from vertically above before being disturbed, & they all lay in horizontal plane. The primary petiole formed angle of 113º with the vertical stem.— [sketch] 113º stem

The leaf was then disturbed by very fine twig for 2', being tapped as much upwards as downwards & then the pinnæ  assumed after 10' positions [represented] by the dotted lines, & angles. The primary petiole had fallen a little now standing 102 with the vertical stem.— The leaflets had all risen up toward each other & towards apex of pinna, so that the surfaces formed to angles of about 45º with horizon.—

The terminal pinnæ  besides converging (had stood in horizontal plane with the rest of the petiole,) but now formed with petiole [diagram] terminal pin 137º

so had fallen 43º the new two basal pair of pinnæ  had also curved a little downwards.—

(2

Acacia Farnesiana 1877

Sept. 7th at night 8º 30' P.m.

Same leaf. The whole plant looks wonderfully different, during sleep as petioles rise & all pinnæ droop down & from the close manner in which leaflets are closed, they look like shorts bits of curved string. The petiole formed with a perpendicular line or stem angle of 147º & therefore had risen 34º instead of having fallen 11º as from shaking: The terminal pinnæ  had now converged more & by [illeg] had run 10º more ie. 26º since being shaken & formed angle of 38º together: 100 [-] 38 [=] 62 — each risen 31º the next pair now formed an angle of 49º, instead of 135º, 180 [-] 50 [=] 130 = 65º so had curved 86º since being shaken; & the basal pair [sketch]  now formed angle 75º, [illeg] since being shaken & so had converged 105º.— Besides this great convergence, the terminal pinnæ bent almost perpendicularly down, & formed angles with primary petiole of 87º ; the next & 3d or basal were parallel is thus bowed down to position. In several leaves [sketch] pinnæ

The terminal pinnæ  formed much less than ∟ with primary petiole & were curved towards base of leaf

[slip of paper pasted on:] — The leaflets are closely pressed together & directed towards apex of leaf so as to [illeg] secondary "petiolules". The sleep-movement is the same as that from shaking only every character character much exaggerated, especially the bending down of the pinnæ  & the closure of the leaflets — The rising of the main petiole is, however directly opposite. I shd have said that the 2 basal pairs of pinnæ rotate a little, so that the lines of junction of tips of leaflets is directed toward apex of pinnæ . Sept 8' 6º. 40' A.m.— Petiole with leaflets not fully open— now form with perpendicular angle of 157º & therefore had risen 10º more since last night, when measured at 8º 30' P.m.