(10

Movement of Mature leaves Red Cabbage

(All the previous observations relate to seedlings not provided with any true leaves, we now observed A seedling & yet provided with cotyledons but with 3 true leaves, the largest of which was with its petiole 3/4 of inch in length, was placed under the M. & the tip of the largest leaf travelled across 5 divisions, or 1/100th in of the M. in 6' 20". It was not ascertained whether how much of the movement was due in the stem leaf & how much in the stem. ) probably in chief part to the latter.)

Lastly a full-grown cabbage had been kept for some time in a pot in the greenhouse, so that the head had become a little elongated with the leaves not close together: a long glass filament was fixed to the mid-rib of an almost central a leaf was 5 1/2 inches in length near the centre & which was inclined at an angle of 44° above horizon, & The movement obs was traced on a vertical glass. The plant was kept in complete darkness except for a minute or two whilst observed at the interval of about every hour. On the first day the leaf

(Fig 9 )

[10v]

[Proof sheet of Forms of flowers, published pp. 182-3.]