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File:British Museum Marine Chronometer.jpg

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Summary

Description
English: Marine chronometer made by Thomas Earnshaw (Senior) that was used on the HMS Beagle.
Français : Chronomètre de marine du HMS Beagle
Date 24 June 2010
institution QS:P195,Q6373
Source/Photographer BabelStone (Own work)

Details

British Museum reference CAI.1957, L210 / Registration:1958,1006.1957
Detailed description Marine chronometer, Rectangular mahogany box, lined with green baize, with brass carrying handles at the sides. Hinged lid with glazed viewing aperture and sliding mahogany cover. A key-operated lock at the front. There is an inserted plain ivory disc in the lid front. Silvered brass dial with Roman hours I-XII within a minutes circle. Subsidiary seconds dial above VI. Plain blued-steel hour, minute and seconds hands. Movement contained in a lacquered brass bowl. One-day spring-driven movement, with fusee and Harrison's maintaining power. Jewelled bearings for train wheels in screwed settings. Earnshaw spring-detent escapement with Earnshaw split-bimetallic temperature compensation balance and free-sprung helical blued-steel balance spring.
Size Height: 17.6 cm (6.9 in) Width: 20.8 cm (8.2 in) Depth: 20.8 cm (8.2 in)
Location Room 39 case 10

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Derivative works of this file:  British Museum Marine Chronometer cropped.jpg

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Date/TimeThumbnailDimensionsUserComment
current07:28, 27 June 2010Thumbnail for version as of 07:28, 27 June 20101,512 × 2,496 (818 KB)FæReduce slight milkiness from glass case reflections. Combination of gamma adjust, exposure reduction and histogram adjustment.
00:19, 27 June 2010Thumbnail for version as of 00:19, 27 June 20101,512 × 2,496 (604 KB)BabelStone{{Information |Description={{en|1=Marine chronometer made by Thomas Earnshaw (Senior) that was used on the HMS Beagle.}} |Source={{own}} |Author=BabelStone |Date=2010-06-24 |Permission= |other_versions= }} [[Category:Marine chronomete

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Quelle: http://en.wikipedia.org/wiki/File:British_Museum_Marine_Chronometer.jpg