[17]

Sept 28' 1878.

Beet Apogeotropism of Hypocotyl

Beta vulgaris

2 Pots were inclined 19° below horizon, & the upturning of Hypocotyl traced on vertical & Horizontal glasses; Kept in darkness. [sketch] — See 2 Tracings

Fig (1) circumnutated on small scale, first from 8°. 28 moving down, till by 8° 55' when began began rising & rose in almost straight line till 12° 3' in 3° 30' by which time had bent through angle of 109°; then slightly zigzagged & passed, as if by momentum, (as is so usual) [illeg]beyond area of ordinary circumnutation. Aft 12 58' began returning & by 9° P.m, had made 2 ellipses— Longer axes, (as so usual) in line of apogeotropism (Straightness quoted)

Fig (2) zig-zagged from 8° 28 to 9° 51' then rose almost straight till 11° 26'— then made a very large ellipse & afterwards a small one, with longer axes in direction of apogeotropic action — These tracings do not illustrate well the passage from apogeotropism to circumnutation, but the commencing commencing action pretty well shown; for I began observing in 2' or 3' after pot inclined.—