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Description: | 30-0-30 (degree scales engraved on a silvered brass bezel a). HENESSY SWANSEA VERTICAL FORCE MAGNETOMETER[ engraved on the needle bearing supports). L.Ma.4. (in aluminium paint on the lid of the box) MANU Hennessy. circa 1880 Swansea, Wales DES after NORMAN,Robert. circa 1576 England.. This vertical force magnetometer is a variant of the dip circle. It has a gimble in the handle which allows it to be used at sea to measure the vertical component of the magnetic deviation caused by the metal in a ship's construction and cargo. This type of instrument was used to adjust compasses. | License: | http://www.hmag.gla.ac.uk/spirit/rights/ | Publisher: | Hunterian Museum and Art Gallery, University of Glasgow | Rights holder: | Hunterian Museum and Art Gallery, University of Glasgow | Subjects: | SCIENTIFIC COLLECTION : | Source: | Hunterian Museum | Creator: | Hunterian Museum and Art Gallery, University of Glasgow | Identifier: | http://www.huntsearch.gla.ac.uk/cgi-bin/... | Language: | en-GB | Go to resource |
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