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Mitscherlich type goniometer



Augustus Oertling, Berlin
Mitscherlich type goniometer (brass) with adjustable telescope, engraved silvered scale and vernier read-out (scales are divided to 10 arc-minutes, and read to 10 arc-seconds with the verniers) with adjusting wheels and goniometric head.
Observation telescope, with swing in lens, engraved "A", with focussing wheel and internal cross hair. Telescope mount held on a column mounted onto a centring vernier above the main vernier.  Signal telescope engraved "B" with focussing wheel and internal cross hair. The telescope is mounted on a collar that allows for adjustment via 4 screws. The collar is mounted at the end of a column which is then mounted on a vernier.
Brass base. In wooden cabinet. Diameter circle 15 cm. Total height of the instrument 27 cm.
Signed on the circle "N. 956. | Aug. Oertling | in Berlin." Mid 19th century.

Collection: private collection
Photographs courtesy of Fleaglass.com


Mitscherlich type goniometer, Augustus Oertling, Berlin


Mitscherlich type goniometer, Augustus Oertling, Berlin


Mitscherlich type goniometer, Augustus Oertling, Berlin


Mitscherlich type goniometer, Augustus Oertling, Berlin


Mitscherlich type goniometer, Augustus Oertling, Berlin