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Description: | A set of brass plates defining Imperial standards for measurement of length, and a large clock, set on brick wall to right of main entrance to Observatory, facing outwards. Also show height above sea level and the Ordnance Survey Bench Mark. The title plate has changed since first site visit, reflecting the change of name of the Observatory. It was Old Royal Observatory, is now Royal Observatory Greenwich. From top to bottom: Shepherd Clock. A large round 24 hour clock set on a black surround of painted metal fastened to the wall. It has 23 Roman numerals round the face and a zero at the top, and has decorative hands. Five minute intervals are marked in Arabic numerals round the outer edge, and there is a small minute dial above the centre. Three grey plastic plates in a row beneath give information about the standards. The left one is about the clock and time ball. The middle one shows height above mean sea level at Newlyn. The right one gives the Ordnance Survey Bench Mark symbol and below that, information about the Public Standards of Length. Painted black stone rectangle with brass lengths across with D-section studs at the ends, between which rulers and other measures can be checked for accuracy. Each brass length has its name in white painted capital letters along it. From the top they are, British Yard, Two Feet, One Foot, Six Inches and Three Inches. To the right of the Two Feet measure is the maker's name. | Subjects: | Indicator | Source: | Vads | Identifier: | http://www.vads.ac.uk/large.php?uid=6984... | Go to resource |
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