RECORD: Darwin, C. R. 1882.02. Data for corrections for 6th thousandth printed Feb 1882 / Worm-Book. CUL-DAR194.19. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 8.2023. RN1

NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Reproduced with permission of the Syndics of Cambridge University Library & William Huxley Darwin. The volume CUL-DAR194 contains loose notes 'removed from correspondence', Humble bees, hypericum, earthworms, potato grafts etc. 1835-1882.

"Johnson, Henry, 1802?-83. Physician. Contemporary of CD at Shrewsbury school. 1826 J was at Edinburgh with CD. 1826 CD to his sister Caroline, saying that J had changed his lodgings for the third time. CCD1:25. J returned to Shrewsbury to practice. 1880 CD to J about excavations at Wroxeter and worms. De Beer 1968, p. 74." (Paul van Helvert & John van Wyhe, Darwin: A Companion, 2021.

Darwin, C. R. 1882. The formation of vegetable mould, through the action of worms, with observations on their habits. 6th thousand. (corrected). F1362. The text corresponds with Earthworms, 6th thousand, pp. 225-26.

[19]

(Ch. 3.) (p. 129)

 

 

 

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(Measurements by D. H. Johnson of the thickness of the vegetable mould over the Roman mines at Wroxeter)

(small type)

(Trenches dug in a in field called "Old Works') at a depth of 36 inches 3 ft deep, of 3 ft came to sand

at a depth of 36 inches undisturbed sand was reached.

do do do at a depth of 33 inches, concrete

do do of 33 inches, concrete was reached

do do of 9 do inches concrete 9 do. concrete

(Trenches dug in a field called 'Shop-Leasows', which this is the highest field within the old walls & slopes down from a in sub-central point on all sides at about an angle of 2°.)

on summit of hill field, trench trench 36 45 inches deep

close to summit of hill field trench 36 inches deep

do do trench 28 inches deep

upper do near top summit of field, trench 36 inches deep

do do, trench at one end 39 inches deep; the mould here graduated into underlying undisturbed sand & the limit its thickness is somewhat arbitrary; at at the other end of the trench, a causeway was encountered encountered at a depth of only 7 inches, & the mould of the thickness was here only 7 inches thick.

Trench close to the last, 28 inches in depth.

Trench near last 14 inches at a depth of 24 inches sand was encountered

Lower part of same field, trench 3. inches deep

do do trench 31 inches deep

do do trench 36 inches deep when undisturbed sand was reached.

Thickness of mould

in inches

 

20

20

21

21

9

 

 

 

26 40

26

28

24

24

 

 

 

 

 

15

 

 

16

15

17

28

 

[19v]

Data for Corrections for 6th Thousandth printed Feb 1882 / Worm-Book

40 (40)

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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 9 October, 2023