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Sulivan, B. J. in correspondent 
1840-1849::1840 in date 
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From:
Bartholomew James Sulivan
To:
Charles Robert Darwin
Date:
12 May 1840
Source of text:
DAR 177: 274
Summary:

Gives CD the results of some calculations for "dip" over different distances, as requested.

Contributor:
Darwin Correspondence Project