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Archive Reference / Library Class No.D258/20/47
Former ReferenceD258/44/38
TitleLetter to Mr Gell from Richard Martinscrofte, referring to Gell's broken instrument, sending a question to work arithmetically to keep his geometical wits from lying idle, referring to a requirement on the winter to measure an irregular heptagon, with diagram and asking how the angles may be found
DateEarly 17th cent
Levelfile
RepositoryDerbyshire Record Office
Archive CreatorGell family of Hopton Hall, Wirksworth
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