| This intricately
designed brass instrument (height 6.5 in.) consists of a mounting
plate and a staff socket connected by a universal ball joint. A
worm screw rotates an internal gear, which in turn exerts pressure
on a leather gasket, thus fixing the ball in place. Decorative setscrews
also fix the mount in position. This mount was likely used to affix
a plane table, transit, circumference, or other similar surveying
device to a tripod stand. |
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