(1

Acacia Farnesiana

Sept 7th 1877.

[Annotated diagram]

Stem

viewed from vertically above

137°

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

transverse

135°

100

64°

Full 8° 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 113° with the vertical stem.— [sketch] 113° 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 45° 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 137°

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

(2

Acacia Farnesiana 1877

Sept. 7th at night 8° 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 147° & therefore had risen 34° instead of having fallen 11° as from shaking: The terminal pinnæ  had now converged more & by [illeg] had run 10° more ie. 26° since being shaken & formed angle of 38° together: 100 [-] 38 [=] 62 — each risen 31° the next pair now formed an angle of 49°, instead of 135°, 180 [-] 50 [=] 130 = 65° so had curved 86° since being shaken; & the basal pair [sketch]  now formed angle 75°, [illeg] since being shaken & so had converged 105°.— Besides this great convergence, the terminal pinnæ bent almost perpendicularly down, & formed angles with primary petiole of 87° ; 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' 6°. 40' A.m.— Petiole with leaflets not fully open— now form with perpendicular angle of 157° & therefore had risen 10° more since last night, when measured at 8° 30' P.m.