[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 17° — 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 14° 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 1° 30 & 4' P.m, but there was no evidence on either day of a regular periodical movement.)

[57v]

[calculations not transcribed]