RECORD: Darwin, C. R. 1880. [Earthworm research notes]. CUL-DAR64.1.21-22. Edited by John van Wyhe (The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Prepared and edited by John van Wyhe 7.2025. 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-DAR64.1 contains material for Earthworms, experiments on worms; different locales & photographs and cuttings from journals.


21

July 26th [1880]

12° 45' Saliva — Bell-glass — Lime & Elm Leaf dark green — Beech — small Hornbeam & Hazel

July 28 12° 45 Hazel, decidedly affected vein reddish & left brown & clears specks — Lime a trace of an effect — vein reddish certainly temp 66° — yesterday sky bright warm say 66°-68° or 67°

29th It is very odd what defined spaces bounded by rain are affected in hazel Temp 64°

31st 8° a.m. Hornbeam — Hazel most affected Lime moderately — Elms& beech part paler green, but veins not reddened

Examined Hazel under 2 inch — vein quite red — in parts chlorophyll seem partially removed, & everywhere trace present minute spots, in other parts chlorophyll — dark gradually brown or even brown.

(over)

21v

July 29th 2° 30 P.m Leaves of Lime SageHazel & Elm — with tips wetted with saliva, rest wetted with water & suspended in little over water pinned to cork lid.

31st 8° a.m no effect

Aug 1 do

Aug 4th Hardly at all affected — threw away

Aug 5 Lime considerably brown vein slightly reddened — sage blackened with saliva vein reddened — Hazel brownish — Veins reddened

Hornbeam no effect

[illeg] Lime as most affected — Hazel barely — sage & Hornbeam not affected

[in margin:] Saliva

Aug 7th Lime slightly blackened vein brownish — Hazel good deal discoloured (not so much as by worms) vein reddish — discoloration chiefly between wind & water — Sage not so black as on 5th veins reddish — Hornbeam no affect.)

[in margin:] water now discoloured

Lime is much discoloured as by saliva — Hazel almost as much — Sage only exterior tip — Hornbeam of

(over)

22

Aug 2d 8 a.m Beech pale green Edged with brown [illeg] wind & saliva — vein slightly pink, certainly vein affected though only slightly

Hornbeam all in [illeg] pale from [illeg] veins, which seem covered everywhere with some chlorophyll

Elm tips pale green, vein not affected.

22v

Aug 2d 12° 45 Hazel — Hornbeam Lime & 1/2 sage with tips in Saliva & in water made similar conditions

(2d Temp 81°) (Aug 3° 62°)

Aug 4th

12° 45 -Saliva — Hazel brownish — Lime pale

Water — Lime pale as most affected as by saliva

Hazel hardly at all affected.)


Return to homepage

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

File last updated 7 July, 2025