[70]

Ap. 5th 1878

Helianthus annus Heliotropism

Yesterday ascertained that seedlings are quickly heliotropic— bending from a little above ground

Ap. 5'. 9° 15' Put in box to S.W. window

2 seedlings painted with thick Indian Ink about upper third of hypocotyl

Painted Light

1 painted lower third

1 & very young one left untouched.

(Not in the least injured by the thick painting with Indian ink.)

[71]

April 5th

Helianthus annus Heliotropism

2 painted Indian ink upper half— not bowed to light

Painted Useless

1 painted lower half — affected as much as the 1 to which nothing done

1 natural lower part of stem very little bowed

Pot laid Horizontally during night all turned well up, showing that the colouring had not hurt them — except 1 plant to which nothing whatever had been done & which curved upwards a very little. perhaps older, marked with stick— I marked this plant with stick to see if it will behave so again.