RECORD: Darwin, C. R. & Francis Darwin. [1878].12.22-[1879].01.05. Common bean. CUL-DAR209.11.144-148. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 7.2023. RN1

NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin. The volume CUL-DAR209.11 contains material for Darwin's book Movement in plants (1880).


(1 & (2

Dec 22 common Bean 11 am to 11 40 finished

4 test control beans 8 blackened with of black grease all round at tip some 2 mm, some 3 mm; all marked with dot at 10 mm—

Dec 23 - 9. 30

One 3 mm black not bent, all others black & white slightly & about equally bent

10 45 Blackened all again making 2 mm. into 3

Oct Decr 24. 920 am

All 4 white ones bent clearly

4 black ones fairly horizontal

4 bent abt as much as white

The strt black ones have grown, 19, 16, 18 20?

Dec 25. 10. 5 am 3 out of 4 white ones nearly vertically down—

Only 2 black ones clearly more horizontal than the rest— No black ones quite as vertical as the white ones

(3

Dec 25 Horizontal common Beans Vicia

Two jars a & b with beans all marked with dot of grease at 10 mm & some greased for 3 mm at tip. Fixed horizontally in damp air

jar (a). 4 with black tips ("Black")

2 not ("white")

7. Black tip

jar (b) 3 black

2 white

7. Black tip

Examined 8.25 pm

jar a, one white much bent down, one another not perceptibly

3 blacks clearly bent the 4th one hardly bent

jar b one white very much, the other very little bent

2 blacks slightly one (the 3rd) hardly bent

Dec 26 8.40 am

jar a All both bk & white bent except 2 blacks, 2 Black bent which have nevertheless grown to 17 & 18 mm (the tips are 3 & 4 mm)

Now filled up jar a so that beans and roots wet.

jar b Both whites § well bent tho' not vertically.

*2 blacks slightly the 3rd hardly at all bent & is nevertheless 20 mm its tip being 4 to 5 mm

These two are 19 mm (tip 4 mm) 20 tip 5 § Both whites are 15 mm

4

jars a + B

Horizontal beans

The forgoing ones same

De 27 1050 am

jar a — Black 1 has its grease washed off is 40° below horiz

Bk 2 20° below horizon & 20 mm in length (ie up to mark)

Bk 3 — 55° below

Bk 4 Horizontal— 20 mm long (to mark)

White i — 75° below — about 20 mm long

White ii 55° below

Dec 27 1040 am

jar b White i— 75° below 30 mm to mark from tip

White ii 55° below 25

Black 1 20° —          32 {That is what was 10 mm has grown to 30, 25, &c

[black] 2 25° — 29

Black 3 15° —          31 {The tips are now 6 or 7 mm, they were 3 mm

Dec 28 930 am

jar b still marked difference between black & white

jar a The two horizontal black beans have not perceptibly altered

[4v]

On comparing

Begin comparing young of animals with young of plants

Then since these precautions are needed the plant must be expose

The heliotrop & geotrop—

Then race & individual going on to onerious system & back to movements again as examples—

5

Dec 29 Jars a + b Horizontal beans

Jar a

[data not transcribed]

{This had grown through the black which had been partly washed off

Jar b

[data & calculations not transcribed]

6

Beans {I think certainly Vicia} B1 B2 Dec 30 about 10 am

Beans germinated in peat on table, pinned to cork or stoppered bottle, 1, 2, 3, 4, only marked with 10 mm

5, 6, 7, 8, 9 also have 3 mm at tip blackened with grease — Put to grow in damp air on table in study

[data not transcribed]

{Average of the white ones excluding No 4 is 55° average of black ones 49, so there is hardly any difference}

Dec 31 — 855 am

No 4 still horizontal The rest show nothing new

Jan 1 845 am. No difference between the whites & blacks— Owing to a mistake in my notes I am not sure whether all the beans where kept till Jan 1 or whether one jarful was thrown away on Dec 31. but I am nearly certain both were kept till Jan 1

(7

Horizontal Beans (Vicia)

(Radicles)

Jan 2. 11. 45 am

Germinated in peat; roots from 4 to 6 cm long: Those called "black" have 3 mm of the tip greased: all, "white" or "black" marked at 10 mm. In damp air on study table

Jar X

[data not transcribed]

Jar Y — ground glass edge & plate; beans in damp air — 2 black & 2 white fixed Jan 2. 12. 10 pm.

Examined 11.15 pm, one white is 40 below, all 3 others about horizontal

Jan 3 filled up with water

Jan 5. The two whites have not geotroped properly one being 15° below & the other 40° (?); while the marked pieces originally 10 mm have grown to 15mm & 19 mm.

(Grease Beans)


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Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)

File last updated 21 August, 2023