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Blackburn, Bewicke in correspondent 
1860-1869::1864::04 in date 
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Herschel13751

From:
Bewicke Blackburn
To:
Sir John Herschel
Date:
[12 April 1864]
Source of text:
TxU:H/M-0106; Reel 1087
Summary:

Describes convection phenomenon observed in hot varnish boiler. This may explain sunspots.

Contributor:
John Herschel Project
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