[269]

Jan 15' & 16' 1878 Veg. Marrow

Radicle protruded from one end of seed (lying going flat on sand) & buried & bur bring itself at right angles in sand, & I then fastened seed with 2 transverse wires the cots to surface of sand, representing superincumbent weight of soil. The space between Cots. & buried radicle grew rapidly & formed bow an arch, & I fixed filament of glass [sketch] .85 in length to part of plumule in connection with the still quite closed & white Cots. The filament projected at about angle of 35° above horizon. The seed being fixed firmly by 2 wires into sand. The Cots still quite enclosed in coats of seed: so shows hypogean movements. The filament was thus affixed to upper part of hypocotyl stem. Traced in darkness on Horizontal glass—

See tracing, magnified 19.3 times, independent of filament. The greater movement from right to left a lateral wriggling movement for the cots to escape out of seed case & out of soil. The movement at right angles, due to the arch rising up more vertically due to greater growth of basal part of plumule. This latter growth was visible with 2 other seeds, one of which likewise lay flat, & the other was half buried in the sand by along one sharp edges.— The lateral right & left movement clearly nutation; which wd certainly have been hypogean.— [sketch]

(Very good)

The plumules not in the least injured by shell-lac.— the Cots. at close had become yellowish.