[92]

Canna warscewiczii

Circumnutate of Leaf

Jun 10 & 11th 1878 to morning of 12th

A fine vigorous young plant— young Leaf with filament attached [sketch] 8 inches long & 3 1/2 broad — Apex 9 inches from vertical glass observed under skylight. Temp. I believe only from 16°-17° Cent.

See tracing from June 10 & 11th — Leaf descend to between 5° & 6° P.m. &. then ascends for part of night, afterwards descending during early morning & remainder of day.— On June 10' traced from 11° 30 to 6° 40' a.m on following morning — On Jun 11th. traced from 6° 40' a.m to 10° 30' P.m & the following morning 8° 40 on following morning, on 12th.—

There can be no doubt about circumnutation; on 11th made some complex little figure at evening turning point — Ascending Ascending & descending lines do not coincide. —

4.5— traced 45h. 45 50'' 2 10

(The movement of a young leaf 8 inches in length & 3 1/2 in breadth, produced by a vigorous young plant, was observed during 45h 50m, as shown in 2 figure (Fig. given ). Two The pot was slided about one an inch to the Right on the morning of the 11th to give the as a single figure wd have been too complicated, but to wh both tracing as continue in time. We see that the The move strongly is periodical as the leaf fell from early morning until about 5 P.m & from this hour rose during the night. On the evening of the 11th it circumnutate on a small scale for some time about the same spot.