RECORD: Darwin, C. R. 1842.06.13. [Observation at Maer]. CUL-DAR64.2.2-3. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 6.2021. RN1

NOTE: [1] Darwin, C. R. 1838. On the formation of mould. [Read 1 November 1837] Proceedings of the Geological Society of London 2: 574-576.

http://darwin-online.org.uk/content/frameset?itemID=F1648

 [2] Darwin, C. R. 1844. On the origin of mould. Gardeners' Chronicle and Agricultural Gazette no. 14 (6 April): 218.

http://darwin-online.org.uk/content/frameset?itemID=F1665

Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin.


1

Correction Maer Paper 4 1/2 years ago

Maer. June 13th 1842.

Field with Walnut tree opposite the House:

In some places came to natural marl-bed & here cinders were exactly three inches, in thick layer, from upper surface of turf. In other softer place layer of cinders 3 1/2 inches & beneath this at 9 1/2 inches from upper surface cinders & burnt marl in few scattered fragments = in another place very indistinct layer of few minute decayingfragments of coal & burnt marl at 9 1/2; upper layer, here only 2 1/2 inches = in another hole some (The weather has been dry plenty of worms at 9 & 10 inches) large pieces of burnt marl at 10 1/2 inches in same hole at only 9 1/2 inches; the upper layer was almost as if it had been put on twice once a 2 inches & another at 3 1/2 from upper surface.

1v

Explain [forcing pushing] of cattle's feet

???

Field close to house =

(1 hole) 4 inches from surface lime in continuous thick layer 6 from surface another layer slime 10 to 12 inches cinder & bits of brick or burnt marl? & few scattered in intervening earth.

(2) 2 1/2 lime & 4 from surface lime: brick & coal at 10 inches depth

(3) Cinder 2 from surface lime 4, cinders & brick 10 inches (& other holes with same results nearly)

Some cinders with lime layers, but not one above the lime. Plenty of worms at 10 inches: now very dry weather for long time & I found cakes of earth penetrate with 7 or 8!! Cylindrical holes as big as swan quill, going right vertically down, which shows how much earth must be brought up; in damp weather must collapse with passes of cattle &c &c. Thus must ultimately break up layers & certainly the lower layers (when not carried down & resting on horizontal under-bed) / are quite irregular in this & last field.


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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