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Shaw, Robert in correspondent 
1870-1879::1876::12 in date 
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From:
Robert James (Robert) Shaw
To:
Charles Robert Darwin
Date:
10 Dec [1876]
Source of text:
DAR 177: 154
Summary:

Adds a point to his previous letter regarding the buoyancy of birds and their soaring capacity.

Contributor:
Darwin Correspondence Project
From:
Robert James (Robert) Shaw
To:
Charles Robert Darwin
Date:
16 Dec 1876
Source of text:
DAR 177: 155
Summary:

Discusses further his theory relating to the soaring capacity of birds.

Mentions hybrids produced by various crossings of game-birds.

Contributor:
Darwin Correspondence Project