Manuscripts/MS Add.3958-4007/MS Add.3974 contains:
Add.3974.1	Notes on Magnetism
Add.3974.2	De natura acidorum
Add.3974.3	Eleven Points for Enquiry in Physics
Add.3974.4	De gemmis in genere
Add.3974.5	De gemmis
Add.3974.6	Of Gems
Add.3974.7	Extracts from Berquen
Add.3974.8	Odd Notes on Gems
Add.3974.9	Gemmarum pretia

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The Portsmouth Collection

Title	Extracts from Berquen
Reference	MS Add.3974.7
Creator	Newton, Sir Isaac, Knight, 1642-1727, natural philosopher and mathematician
Covering Dates	c 1670-c 1680
Extent and Medium	ff.4 [quarto]; paper

Content and context

Louis de Berquen of Bruges (fl. 1450-1470) was the inventor of modern gem-cutting.

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