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Collections > Clocks & Watches > Portable Sundial
Portable sundial in brass in the form of a cross is signed Tassel. Several Tassels worked in Rouen, France in the 17th century. It is also engraved 'Ieanhaimes, possibly for 'Jeanhannes', and 'Rothomagi', which means 'at Rouen' or 'of Rouen'. The compass may be an 18th century addition. The sundial opens fully on hinges. Its rear compartment a relic. A table engraved on the back is a perpetual calendar. The hinged gnomon within was used to set the sundial for the right latitude, using the scale of co-latitudes. The sundial was then aligned north/south. The time could then be read on the upper middle dial or the one set back-to-back with it. Lunar readings are also possible.
Size: Length: 7.6 cm; Width: 5.6 cm; Depth: 1.5 cm.
Artist / Maker: Tassel
Object Type: sundial
Materials: Brass, Satin
Museum Accession Number: Founders/CW.91