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Harrison, L. C. in correspondent 
1870-1879::1872::02::08 in date 
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From:
Lucy Caroline Wedgwood; Lucy Caroline Harrison
To:
Charles Robert Darwin
Date:
[8 Feb 1872]
Source of text:
DAR 63: 79–80
Summary:

Describes earthworm experiments. She has measured depth of mould in various locales, e.g., on ridges and furrows of an old ploughed field.

Contributor:
Darwin Correspondence Project