Details
An 18th-Century brass universal equinoctial ring dial,
unsigned, the equinoctial ring divided III-XII-IX, the meridian ring divided on one side with a quadrant scale, the other side with declination scale, the bridge with sliding pin-hole sight over a calendar scale, with adjustable suspension mounting and loop -- 4½in. (10.4cm.) dia., with an original manuscript instructions for use in French and a drawing of a similar instrument, with leather carrying pouch
See Colour Illustration and Detail
unsigned, the equinoctial ring divided III-XII-IX, the meridian ring divided on one side with a quadrant scale, the other side with declination scale, the bridge with sliding pin-hole sight over a calendar scale, with adjustable suspension mounting and loop -- 4½in. (10.4cm.) dia., with an original manuscript instructions for use in French and a drawing of a similar instrument, with leather carrying pouch
See Colour Illustration and Detail