The Complete Work of Charles Darwin Online

RECORD: Darwin, C. R. n.d. [Worm notes on chalk]. CUL-DAR65.42. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 8.2021. 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-DAR65 contains materials for Earthworms, notes, observations, proofs etc. 1880-1881.

Very clean looking chalk from the deepest part of chalk pit between Holwood & Leve's Green 20 or 30 feet below surface –

Chalk – 46.39 grams, residue 0.27 gramms

[calculations] = 0.6 per cent

Abinger

Two samples of chalk from close below surface – (Laura Forster)

I crumbly and reddish in colour

chalk = 39.57 gramms residue 1.45

[calculations] = 3.7 per cent

Abinger

II Cleaner looking hard chalk

Chalk = 43.24; Residue = 1.19

[calculations] = 2.8 per cent

Explain thickness of mould on plains near Stonehenge

Fissures may do much. Horace Brighton

Pot at Down – open

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