Reference numberMM/10/158
Title'A Brief Description of the improvemnets made in the Mariner's Compass', by JG Ulrich
Date2 January 1840
DescriptionUlrich sets out his claims: "the introduction of a properlyturned and finely polished Point for the Card and Neidle [sic] to traverse upon made of material that is not subject to oxidation and sufficiently hard to wear for many years without requiring any repair".
Extent3 sides
Access statusOpen
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