From:
Henry Johnson
To:
Charles Robert Darwin
Date:
12 Jan [1872?]
Source of text:
DAR 168: 65
Summary:
Sends a map of a field showing the effect of earthworms.
Contributor:
Darwin Correspondence Project
Showing 1–2 of 2 items
Sends a map of a field showing the effect of earthworms.
Thanks for notes on worm-castings. Amount of ammonia surprises CD. David Forbes asserts that published analysis of carbon in vegetable matter valueless. Suspects that worms search for food and do not blindly swallow earth.