[118]

Radishes var (Turnip-rooted)— Radicles touched with L. Caustic

Dec 29' 1878 10° 50' a.m — germinated in saw-dust so tips only slightly damp, touched momentarily with sharply pointed stick of dry L. Caustic on one side of apex. — left in air for about 5' & then immersed in water in the dark, Seedling placed on paste board with hole in it for radicle to go through. (a)

10.50 [-] 8.30 [=] 2.10

(1) Dec. 30' 8° 30' a.m say. 22 hr' bowed from browned apex about 60° from the perpendicular.

(2) Dec 30' 8° 30' bowed from browned apex about 40° from the perpendicular

(3) 30' 8° 45' touched all other again & left in water, for none had been acted on.

31st 8° a.m decidedly curved, but I cd not distinguish any dark mark on apex.—

(4) 31' 8° a.m end shortly curled & curvature towards brown mark O

(5) 31' 8° if any difference effect. curvature towards brown side O

(6) 31' 8° I think very slight curvature from brown side?

(7) 31' 8° quite straight O

The general result very doubtful, except in 2 cases, owing to extreme thinness of radicles, scarcely possible to experiment successfully.

[118v]

(a) I tried in this fashion because with radicles of Sinapis alba, which had been in water & then gently touched with blotting paper, a momentary touch with the caustic blackened the whole tip.—

One trial, with caustic generally failed, [few words illeg] the difficulty of not injuring the extremely fine tips too much. Out of 7 radicles thus tried, one become bend after 22h at an angle of 60°, another a second at 40° & a third slightly from the perpendicular & from the side with a brown mark. cauterised side