From:
George Howard Darwin
To:
Charles Robert Darwin
Date:
2 May 1872
Source of text:
DAR 89: 131–2, 187
Summary:
Sends sentences from Hermann von Helmholtz about difference between minor and major chords.
Contributor:
Darwin Correspondence Project
Sends sentences from Hermann von Helmholtz about difference between minor and major chords.
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.