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Riemann, Rudolf in correspondent 
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From:
Rudolf Ehrenfried (Rudolf) Riemann
To:
Charles Robert Darwin
Date:
9 July 1875
Source of text:
DAR 176: 157, 157/1
Summary:

Professional sheep-breeder interested in laws of inheritance reports his crosses between Serinus hortulanus and Dryospiza canaria. Seeks to make a new species. Crosses carried out with animals varying in their proportion of Serinus and Dryospiza parentage. Confirms Prosper Lucas’ law as given in Origin, ch. 9, with exception that strong individuals exhibit prepotency.

Contributor:
Darwin Correspondence Project