[57]

Acacia retinoides

circumnutation of a phyllodium

Stem secured at base of phyllodium

1878

June 18 A young leaf 2 3/8 long, under skylight, observed & traced as in here shown. Temp on 18th 16 1/2 to 17º — on 19th 17 1/2 [sketch] vertical glass

On 19th observation made at longer intervals so figure less complex— No doubt circumnutate quickly & in complex manner. (Keep)

Assuming that whole leaf moves apex moved up & down on 18th of inch.—

24 [-] 2. 30 [=] 21 30 10. 45 [-]8. 15 [=] 2. 30 48 [-] 2. 30 [=] 45. 30

Aca. ret. Legum

(The movements of a A young phyllode, 2 3/8 inch in length, inclined at [illeg] angle abv horizon, with the stem secured was traced during 45 h. 30'; but in the figure given (Fig) the its circumnutation is shown during only for 21.h 30m. During the day that time part of the time 14º 30 the phyllode made described in the course of a figure repeating 5 or 6 small small ellipses. The actual amt of movement in a vertical line in the course of the day was nearly .3 of an inch. It rose considerably between 1º 30 & 4' P.m, but there was no evidence on either day of a regular periodical movement.)

[57v]

[calculations not transcribed]