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Date: |
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Description: | 1756 1844
DENT Inventor & Patentee LONDON. CHRONOMETER MAKER TO THE QUEEN
Dry compass
Card: Mica covered with paper, black with white markings, graduated to quarter points.
Needle: Two heavy edge bar needles 4.35" (11.1 cm) in length, attached to card by a brass ring.
Pivot: Double pivot type, upper pivot secured to centre of card by a brass boss and is fitted with a spider of four brass arms, fitted with weights for balancing which radiate from central boss. Lower pivot secured to centre of card by a heavy brass boss which has two struts linking the two edge bar needles with the pivot.
Inscription.
caption: Record Shot - Do not reproduce. | Publisher: | "http://collections.rmg.co.uk/" | Rights holder: | "Royal Museums Greenwich" | Source: | Royal Museums Greenwich | Identifier: | http://collections.rmg.co.uk/collections... | Go to resource |
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