From:
John Tyndall
To:
Charles Robert Darwin
Date:
23 Feb [1871]
Source of text:
DAR 106: C5–6
Summary:
Has devised a respirator for firemen by moistening cotton wool with glycerine and adding charcoal. JT suggests the nose with its hairs and mucus is a respirator that would give protection against diseases caused by floating particles. The presence of hair and mucus is thus explained by CD’s theory.
Contributor:
Darwin Correspondence Project
