細節
A GEORGE III MAHOGANY, EBONY-STRUNG AND IVORY-MOUNTED BOW-FRONT STICK BAROMETER
William and Samuel Jones, London. Late 18th Century
The case with turned ivory caps to swan neck pediment and centred by a detachable vase-shaped ivory finial, with shield-shaped back to moulded ebonised urn-shaped cistern cover, this resting on an ivory inlaid plinth, the silvered and engraved register plates with Vernier scale and signed 'W & S JONES No.30/Holborn London'; turned bone Vernier key; mercury removed
40½ in. (103 cm.) high; 5½ in. (14 cm.) wide; 3¾ in. (9.5 cm.) deep