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Description: | Vertical disc dial for latitude 47� North. Brass vertical disc dial with a suspension ring attached to the date indicator. On the obverse side are hour-lines for 4 am-8 pm. Various decorative circle arcs are drawn, centred on the hinged brass pin gnomon. It is stamped 'R. I. COI:.'. The reverse side has a date scale divided from solstice to solstice, marked by month. The equinoxes are given at approximately 20 March and 20 September. A brass index arm is held by a central pivot and extends across the whole diameter of the disc; the suspension loop is attached to one end while the other has a bevelled edge to mark the date in the date scale. The style of the dial suggests a possible Italian origin, but the latitude is that of Switzerland, Austria or mid-France.
For more information regarding this dial please refer to the OUP & NMM catalogue, 'Sundials at Greenwich'.
caption: Vertical disc dial | Publisher: | "http://collections.rmg.co.uk/" | Rights holder: | "Royal Museums Greenwich" | Subjects: | Vertical disc dial vertical dials Sundials at Greenwich Altitude Dial | Source: | Royal Museums Greenwich | Identifier: | http://collections.rmg.co.uk/collections... | Go to resource |
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