细节
A brass Butterfield-pattern sundial
by Delure, Paris, with bird-gnomon, hour scales and compass box, the underside engraved with the latitudes of 28 Continental cities -- 3¼in.(8cm.)long, 18th century
by Delure, Paris, with bird-gnomon, hour scales and compass box, the underside engraved with the latitudes of 28 Continental cities -- 3¼in.(8cm.)long, 18th century