[33]

Gossypium maritimum & Brasiliense

A pair of opposite leaves was observed in each species at the following times

12 noon July 30, 4.10pm & 7.50pm July 31, 12.25 Aug 1, 740pm Aug 3; G. brasiliense was observed 12.25 Aug 2

In one leaf of G. maritimum there is a the leaf falls from 45° above horizon at noon July 30 to 25° below 750pm July 31 during which [illeg] time the petiole did not move at all— This gives a fall of 70° — The fellow leaf fell from 5 above at 4pm July 30 to 40 below 7.50 pm July 30 or a fall of 45° while the petiole did not move— {N.B The first leaf which fell from 45 above to 25 below increases the radiating surface at night

[33b]

The same two leaves on Aug 3 740 were 25° & 45° below, but there are such uncertain puzzling movements of the stalk petiole that I cannot tell the exact amount of fall due to the leaf movement.

Gossypium brasiliense

The left hand leaf fell from 23 above 1150am July 30, to 20 below 7.50 om July 31 or 43° in all while the stem petiole did not move; during the same time the Right hand leaf fell 18° below to 60° below (or 42° in all) while the petiole did not move.

On Aug 3 at 7.40 pm both leaves were well below horizon {leaf one 45° below, Rt on 70° below} but the stalks petiole having moved in a way I don't understand I can't say they are not worth considering much.— I don't think there is any

[33bv]

mistake in my note as I know I was puzzled at the time, & thought that either the petiole had bent or through lateral light or that the Gossypium bushes had been shaken or disturbed— They grew in green house in Bot Garden at Würzburg

1878