39

Mar 8' 5º P.m apex of R. of left Hand further bean almost touching surface— Kept dark & painted with brush

9th 2º 40' nearest bean apex touching at high angle [sketch]

Mar 12'   4º 40' apex just reach the wood — extreme apex a little flatter near side

(Used)

  7º. 15 apex not now flattened, but I think rather more oblique.

  10. 15. apex perhaps blunter —a little— has moved to right to point where at recording angle sticks meet.

11th 7º 45' a.m.— apex now sharp again & points more vertically down, resting on bean — it has moved a little more to near side— Growth on the convex side, the result of [sketch] geotropism. wd cause this movement of increased bowing— ↓ wood less than 1/20th of inch thick The travelling to one side due to nutation for no recognizable different & level, on the 2 sides of transverse stick. Very little force can be exerted through geotropism otherwise point wd be flattened— when inverted may swell.—

(No furrow on the bean covered, with Lamp-black dust wetted.)

(The extreme apices with red paint do not seem to grew beyond

11º 25 has move laterally past the stick, as shown .... I believe surface does slope very slight to the side— Moved the further stick to position shown by dots & inclined the bean so that if it follows gentle slope must reverse curv. curvature

slope of Bean →

(measure slip of Wood)

Show importance of lateral movement

4º P.m. still going up hill!!— I think depends on lateral flexure which tip had assumed

5º 30' I think no further up hills

10 15 greater beyond end of stick & going right down.

39v

[proof sheet of Cross and self fertilisation, pp. 20-21]