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Young, Samuel in correspondent 
1810-1819 in date 
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From:
Samuel Young
To:
Sir John Herschel
Date:
[17 June 1819]
Source of text:
RS:HS 18.314
Summary:

Mineral apophyllite [Argentine spar]. Offers gems and minerals from India for JH's experiments. David Brewster's papers raise questions about polarized light. Describes microscope SY found.

Contributor:
John Herschel Project
From:
Samuel Young
To:
Sir John Herschel
Date:
[1819 to 1826]
Source of text:
RS:HS 18.319
Summary:

Will show JH largest specimen of apophyllite [Argentine spar] in kingdom.

Contributor:
John Herschel Project
Document type
Transcription available