[58]

Red Cabbage

Furrow

Oct. 31. 1878

8° a.m— Pot with young seedlings,— Height from .4 to .55 of inch [sketch] with red-sand well syringed as usual & fitting close round bases of Hypocotyls

Exposed in black box to Paraffin Lamp.— examined at 5° P.m. —after 9° — Most of them had their upper part close near & almost parallel to sand, with the basal part of Hypocotyl curved down to sand & beneath it. The sand was carefully removed on one side & in 3 cases the curvature extended down certainly to depth of .1 of inch; in anoth 4th case to .11 & in 5 case to .15 we know that light is absolutely excluded at this depth. The degree of curvature was slight, as represented by needle stuck in card to represent the chord, being 11° & 15°, which fairly represented all the cases.— On face side of hypocotyl facing the light the sand was close to hypocotyl & slightly heaped up— to leeward or below hypocotyl there was slight very narrow open curvature crack which was difficult to measure but was as seen, through micrometer eye-piece, rather above 1./100 of inch wide. ↘

[58v]

So action of Light transmitted not only fr upper part of Hypocotyl to lower & exposed part, but beneath the surface of soil.—