拍品 29
29
A rare 18th-Century brass horizontal inclining Meridian finder and sundial,
A rare 18th-Century brass horizontal inclining Meridian finder and sundial,

细节
A rare 18th-Century brass horizontal inclining Meridian finder and sundial,
signed Inventé par Julien Le Roy de La Sociéte des Arts Executé par Langlois AParis aux Galleries du Louvre, engraved with the latitudes of thirty-two continental cities, towns and islands (see below), an Echelle des Latitudes divided 30°-55° for use with a plumb-bob from the gnomon set at an angle of 49°, pierced for seven positions for the plummet, the scale labelled 42 Degrez Horizon propre, the hour scale in Roman numerals V-XII-I-VII with Arabic divisions for quarter, half and three-quarter hours, a glazed compass case set at the base of the gnomon with an engraved wind rose and blued-steel needle, a movable adjustment arm for the Declinaision occidentale with a scale labelled 0-30, with four adjustment screws with ocatgonal heads, the plate -- 9.5/8in. (24.5cm.) long; contained in a fitted, pink stained chamois leather lined card case with gilt galloon trimming, with a space for two brass plum-bobs, one of cylindrical form, the other of conical form with iron tip, the exterior of the case with dark maroon leather covering and gilt foliate decorative tooling, with four brass hooks and eyes (some light rubbing, some small spots of pale pink paint) -- 10.7/8in. (27.6cm.) long

See Colour Illustration and Details
出版
DAUMAS, Maurice, Scientific Instruments of the 17th & 18th Centuries and their Makers (London, 1972)

拍品专文

Table of Latitudes

Paris 48. 50' jerusalem 32.
Barcelone 41. 26' Isle de Rodes 36.
Naples 41. Turin 45.
Rome 42. Brest 48. 28'
Bologne 44. 30' jsle de Chipre 35.
Chambery 45. 40' jsle de Candie 34.
Vienne.Aõtriche 48. 22' Madrit 40. 26'
Bilbaos 42. 40' Marseille 43. 19'
Seville 37. Gennes 44. 25'
Cap St Vincent 36. Luques 43. 5'
Florence 44. Cadix 36. 37'
Treñte 46. 28' Montpellier 43. 36'
Venise 45. 40' Roen 49. 26'
Parme 45. Nañtes 47. 13'
Modene 44. 30' Malte 35. 54'
Milan 45. Lion 46.


Julien Le Roy was Director of the Fernch Société des Arts in the early eighteenth century. A clock-maker by trade, he worked closely with the two finest French instrument-makers of the time, Lemaire and Langlois. He was responsible for several inventions which were then constructed by one or the other of these makers, such as the sundial offered here.