Reference numberAP/10/11
TitleUnpublished letter, regarding a new magnetic instrument from Thomas Unthank to the Royal Society
DescriptionUnthank describes his discovery of a magnetic instrument and its uses. He does not explain the design, construction, or materials used in the instrument, but explains that it could be useful in mathematics, surveying, and navigation. Unthank requests that a response be sent to him at Habergham Colliery, Burnley, Lancashire [England].

Subject: Scientific Instruments
Physical descriptionInk on paper
Access statusOpen
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