Live auction - Lot 1170
[Surveying instruments]
Graphometer.
2nd half 19th c
€ 100 / 200
Live bidding (Drouot*) Live bidding (Invaluable*)Bidding is closed
Lot description
Brass graduated semicircle with a pair of sight vanes at either end, and a movable alidade with another pair of sights at either end, telescope and plumb; 39,5 x 44 cm (oxidation of varnish).
Wooden box (47,5 x 24,5 x 8 cm).
Presumably French semicircle for angle measuring (without inset magnetic compass, but with ball and slot joint to stand, to permit rotation through 180° in a vertical plane).
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