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Nov. 14th 1878 Beta vulgaris — Light. upper 1/2 protected Gold-Beaters skin

Exposed to Paraffin Lamp in dark at 9º 20' a.m. examined Temp of room only 55º F.-56º— 54º at night

Young seedlings with Cots hardly raised to straight line.

Hypocotyl. upper half of 4 covered with gold-beater skin left unpainted

 — — of 7 painted twice with thick Indian ink.—

Examined Nov 15th 7º 30' a.m, having been exposed all this time to Paraffin Lamp.— Plant proves bad for purpose as the hypocotyls do not bend down to very base.— Nevertheless I think 3 of the Blackened ones are have their basal halves a little curved towards light, the other straight, but difficult to compare

The 4 with unpainted skin well curved to light.—

The painted upper half curved in none.—

[34]

Dec. 4th 1878. 2 Pots of Phalaris exposed to Paraffin & 1 of red Cabbage from 7º 40' a.m to 4º 35' P.m & were nearly horizontal— They were then turned up & pot laid on one side & 3 plants in each pot found with cots. vertical by Phal-line. They were observed till 8º 30' P.m.— Three of the 6 inclined outwards i.e. in opposition to gravity as much as 11º, 4º & 6º, some others were more inclined inwards — this was at 6º 30'— afterwards they changed their inclination a little & so they did next morning, & I concluded that they were simply circumnutating.

[in margin:] With cabbage I cd perceive no bending outwards

On the whole I may conclude that in my former observations as evening draws on & plants move from light this is due to apogeotropism acting on circumnutating stems.— I ought to have said that I expected that when light suddenly ceased cots wd have bent in opposite direction owing to tension on illuminated side having ceased & growth not having completed work on convex side, but no evidence of this—

(over)

[34v]

I examined 3 of most bent stems under compound & simple, illuminated from above & below & cd see no vestige of transverse creasing on the rectangularly concave side.

Phalaris. N.B. To make these observations of value I sought to bend mechanically some be straight cotyledon into a rectangle & look at concave side & see if creases can be distinguished.— If pushed by growth on darker convex side, there wd be creases on the concave side.