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Quatrefages de Bréau, Armand de Quatrefages in correspondent 
1860-1869::1868 in date 
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From:
Jean Louis Armand (Armand de Quatrefages) Quatrefages de Bréau
To:
Charles Robert Darwin
Date:
4 Mar 1868
Source of text:
DAR 85: B66–7
Summary:

Proportions of sexes of the silkworm are about equal, but knows of no statistics.

Cannot share his view of origin of species.

Contributor:
Darwin Correspondence Project
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