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From:
William Turner Thiselton-Dyer
To:
Charles Robert Darwin
Date:
20 Oct 1875
Source of text:
DAR 47: 205–6
Summary:

It has been empirically established at Kew that insular plants tend to be heteromorphic, plants with entire leaves tending to produce divided leaves.

Contributor:
Darwin Correspondence Project
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From:
Charles Robert Darwin
To:
John Tyndall
Date:
20 Oct [1875]
Source of text:
Rensselaer Libraries, Rensselaer Polytechnic Institute (Gerald and Sue Friedman manuscript collection MC 72 Box 1)
Summary:

JT’s tube [of boiled infusion] dated 16 Oct was clear on 19th; on the 20th it was muddy and contained many bacteria in living movement.

Contributor:
Darwin Correspondence Project