An 18th-Century brass horizontal inclining dial

細節

An 18th-Century brass horizontal inclining dial
signed Invent par Julien Le ROY de La Societ des Arts fait par Jacques Le MAIRE de La Societ des Arts au genie A Paris, engraved with latitudes of twenty-two continental cities and towns (see below), a latitude scale divided 35-60 for use with a plumb-bob from the gnomon set at an angle of 49, the hour scale in Roman numerals and Arabic divisions divided III-XII-XII-VIII with four replacement adjusting screws, he plate -- 8.7/8in. (25.2cm.) long

See Colour Illustration

拍品專文

TABLE OF LATITUDES
d m d m
Amsterdam 52 29 Petterbourg 60 0
Lisbonne 38 45 Copenhague 56 20
Chalons 46 45 Varsovie 52 14
Vienne 48 14 Strasbourg 48 30
Marseille 43 19 Venise 45 35
Toulouze 43 37 Florence 43 46
Messine 38 0 Calais 50 57
Madrid 40 30 Toulon 43 6
Dantzic 54 20 Naples 40 48
Brest 48 23 Rome 41 50
Lio 45 45 Paris 48 51