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July 22 1873 Flowers of Drosera open 7' 30— Plate brought down to study, after 20 all closed. Poked w. bristle into one flower, in doing this, handled pedicel, this flower & another closed in about 5—, shewing it was the handling. Flirted with brush w. water on 2 flowers, closed in few minutes, but then I bent the flower-stalk — Put drop in another flower & it closed, but then this might have been the carrying down here.— (Flowers closed at 12°)

(Plenty open on Common abt 11° 30', Lettington) (Knocking flower-stem for few minutes caused flower to close)

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Flowers of Drosera 1873

July 23d. Syringed 2 flowers with Frank no effect

(Poked all parts of fl. repeatedly with Bristle no effect

At 9° 48' syringed same flower & another so that I saw large drops within flower; 10° 22' both flower well shut— Sun continuing to shine brightly.)

(flower put drop of water onto it at 9° 37', at 9° 47' almost closed; looked again at 10° 23' quite shut.)

(Shook strongly a flower stem with one flower, after 15' not closed — at 10° 20' put a drop of water within it, at 10. 24' 2/3 closed; at 10° 26' closed.)

(At 9° 2 ' put drop of water in flower, at 9° 31' almost closed, at 9° 47' quite shut.)

(Covered up 9°. 35' some plants bearing 8 open fls under larger pot not quite dark, but nearly so; at in 15' not quite closed but considerably closed; when I looked at 10° 22' all quite shut. —

(Drops of water most effective; next darkness, I doubt about shaking.)

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July 24th

Drosera Flowers

Shook & handled a pedicel for 1s in 4.' 30" half closed; in 8' 30" from commencement of shaking quite closed.

Poured water all over unopened flower buds & down whole pedicel no effect after 12'— then put drop of water into 2 flowers; in 6' one of them closed; the other half closed in 6' & quite closed in 8'.

Plant with 2 flowers not very fully expanded brought into my study; in 7' no effect; in 12' from being brought in, quite closed.

Put drop of w. into flower, in 8' half-closed

Put drop in flower in 7' nearly closed in 8' quite closed.

Shook pedicel & drew it through my fingers, in 6' half-closed in 10' almost completely closed.

Drop of water in flower, in 7' almost closed. but in 15' not quite closed & apparently never wd quite close.

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Flowers of Drosera

July 25' put drops into 4 flower & all closed in a few minutes.

July 27 Three flowers with drop of water at 72° (temp. of House) pla w placed within them by pipette closed almost pretty closely, & quite shut in 5 or 10 minutes more. In closing the little drops of water are forced out

Another flower was squirted with water from fine pipette twice, at temp about 96-98°, in 5' petals closed so as to stand perpendicularly, instead of being widely expanded, & in 5' more more was quite or almost quite closed.

July 29th When taken out of Sun into N. Room flower all closed in from 10' to 15' & 2 which I had irritated with bristle not quicker than others.—

July 30th irritated 1 flower with bristle for 1' & another flower for 2' no movement. — then put water at temp. of House (i.e. about 88°) on them & on 2 other flowers & they did not close. I afterwards tried 4 flowers with water at temp of 66° & in 15' was nearly shut. This fact, together with that when plant brought into

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my study, which was much cooler than greenhouse, all soon closed, shows that it is temperature in accordance with Pfeiffer. It is, however, odd that flower before with water at 98° closed— was it due to evaporation?

Sunshine is not necessary for opening of flowers, for they opened on floor in morning when sun did not reach them. —

I cd introduce this as * to show caution necessary about water not being the active agent.—