RECORD: Darwin, C. R. n.d. Nachwirkung. CUL-DAR209.8.89. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 7.2022. 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 volumes CUL-DAR209.7-8 contain notes on heliotropism (phototropism) for Darwin's book Movement in plants (1880).


[89]

Nachwirkung

10° 40' exposed to light first dot.

10. 54— both moved some way

11. 4 both gone back

Left—

11° 20 to left right

11. 40 to right & light

12. 4' to light & Right

12 37 to light long way

12 39. completely darkened Splint of Blac}

12. 54 1/2 gone on

1° 6 dot with line. candle alone & rather opposed to progress

1. 18' back ⨀

1 . 30' still further back ⨀

2. 15' ⨀ — opposite where stood at 11°. 20 when first started to light

Right

11° 20' back further

11. 40 back (circumnutation has filament prevented bending??

12° 4' far back

12. 37. short way

[calculations]

2°. 18' light again (same plant

2° 20' first dot

2. 37 —f back— "nachwirkung of apogeotropism", or circumnutation

2 48 still back (dull cloudy sky) & second trial

3° a good way to light

3. 15'? to light.

3.45 do — Blackened

3 59 advanced to Light} — after 14'

4. 7 gone back— may have gone back still earlier

after 8'

4. 13 a little furth back zig-zag

4. 36 far back from light

5 6. back & exactly opposite where started from this at 2°. 18'


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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 25 September, 2022