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Vertical Circle Goniometers


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Wollaston goniometer
Early Wollaston type goniometer (brass) with engraved scale and vernier read-out with twin adjusting wheels, raised on an inverted V-frame, on mahogany plinth base (cut at edge). Diameter circle 11.2 cm. Stored in a plush-covered ebonized base and glass dome.
Signed on circle "Cary London", ca. 1815.

Wollaston goniometer




Wollaston goniometer
Early Wollaston type goniometer (brass) with engraved scale and vernier read-out with twin adjusting wheels, raised on an inverted V-frame, on mahogany plinth base. Diameter circle 10.7 cm. Stored in a mahogany box (13.4 x 12.7 x 16.7 cm) that also serves as a support for the goniometer during measurements.
Signed on circle "Cary London", ca. 1815. Also engraved on the circle: "DS & A GEO: LAB: 148".

Wollaston goniometer




Wollaston goniometer
Early Wollaston type goniometer (brass) with engraved scale and vernier read-out with twin adjusting wheels, raised on an inverted V-frame, on mahogany plinth base. Diameter circle 10 cm.
Unsigned, but supposed to be of Italian origin. First half 19th century.
Wollaston goniometer




Wollaston goniometer
Wollaston type goniometer (brass) with engraved scale (0.5 degree) and vernier read-out with twin adjusting wheels and fine adjustment. Diameter circle 11.2 cm.
Signed on circle "Pixii, Rue du Jardinet N°. 2 à Paris", first half 19th century.





Wollaston goniometer
Wollaston type goniometer (brass) with engraved silvered scale (0.5 degree) and vernier read-out with twin adjusting wheels. Diameter circle 11.2 cm.
Unsigned, first half 19th century.

Wollaston goniometer




Wollaston goniometer
Early Wollaston type goniometer (brass) with engraved scale and vernier read-out with twin adjusting wheels, on walnut plinth base. With a diaphragm type disc to fix the eye position with respect to the reflecting crystal. Diameter circle 11.6 cm.
Signed on circle "Grindel Carlo", 1st half 19th century (before 1847).


Wollaston goniometer





Wollaston goniometer [replica]
Wollaston type goniometer (brass) with engraved scale and vernier read-out with twin adjusting wheels, raised on an inverted V-frame, on wooden base, stored under glass dome. Diameter circle: 11 cm. Height goniometer: 13 cm, total height including base and glass dome: 16 cm.
Signed on circle: "Böhm & Wiedemann | München | No. 16" (part of a series numbered 1 to 25), ca. 1990.


Wollaston goniometer


Wollaston goniometer with mirror attachment
Wollaston type goniometer (brass and blackened brass) with mirror attachment, engraved silvered scale and vernier read-out with twin adjusting wheels and fine adjustment. Diameter circle 11.5 cm, height: 17 cm.
Signed on the circle "F.G. Hofmann | Paris", second half 19th century.

Wollaston goniometer with mirror attachment




Wollaston goniometer with [missing] mirror attachment
Wollaston type goniometer (lacquered brass and blackened base) with engraved scale and vernier read-out with twin adjusting wheels and fine adjustment. The mirror is missing on this instrument. Diameter circle 11 cm, height 19 cm.
Signed "Deyrolle | Paris", second half 19th century.

Wollaston goniometer with mirror attachment




Wollaston goniometer with mirror attachment
Wollaston type goniometer (lacquered brass and blackened base) with engraved scale and vernier read-out with twin adjusting wheels and fine adjustment. Diameter circle: 11 cm, height: 19 cm
Unsigned, end 19th century. A similar instrument (the mirror is missing) present in the VHMH collection is signed "Deyrolle | Paris"

Wollaston goniometer




Wollaston goniometer with mirror attachment
Wollaston type goniometer (brass) with mirror attachment, engraved scale and vernier read-out with twin adjusting wheels and handle. Lead-filled base. Diameter circle 19.8 cm.
Unsigned, end 19th century.

Wollaston goniometer with mirror attachment




Wollaston goniometer with mirror attachment
Wollaston type goniometer (brass and blackened brass) with mirror attachment, engraved silvered scale and vernier read-out with twin adjusting wheels and fine adjustment. Diameter circle 15 cm, height: 23 cm.
Signed on the mirror attachment "Mon Jules Duboscq | Ph. Pellin | Paris", between 1883-1886. The base also carries the engraving "AF 488".

Wollaston goniometer with mirror attachment





Wollaston goniometer with mirror attachment
Wollaston type goniometer (brass and blackened brass) with mirror attachment, engraved silvered scale and vernier read-out with twin adjusting wheels and fine adjustment. Lead filled brass base with 3 screw leveling feet. Diameter circle 12 cm, height: 20 cm.
Signed on the mirror attachment "SECRETAN | PARIS", and on a trade label to the lid of the case. Ca. 1880.
Wollaston goniometer with mirror attachment




Wollaston goniometer with mirror attachment
Wollaston type goniometer (brass and blackened brass) with mirror attachment, engraved silvered scale and vernier read-out with twin adjusting wheels and fine adjustment. Lead-filled base. Diameter circle: 12.3 cm, height: 21.5 cm
Unsigned, second half 19th century

Wollaston goniometer




Wollaston goniometer with mirror attachment
Wollaston type goniometer (brass and blackened brass) with mirror attachment, engraved scale and vernier read-out with twin adjusting wheels and fine adjustment. Lead-filled base. Diameter circle: 11 cm, height: 17 cm
Unsigned, second half 19th century


Wollaston type goniometer with mirror attachment, unsigned


Wollaston goniometer with mirror attachment
Wollaston type goniometer (brass) with mirror attachment (unconventionally mounted), engraved silvered scale and vernier read-out with twin adjusting wheels and fine adjustment. Mounted on wooden base. Diameter circle 14.1 cm, height excluding wooden base: 20.7 cm, length 20.4 cm. Specimen holder missing.
Signed on the edge of the circle "Brunner F`res à Paris". between 1862 and 1895.


Wollaston goniometer with mirror attachment



Wollaston goniometer with mirror attachment
Wollaston type goniometer (brass) with mirror attachment, engraved silvered scale and vernier read-out with twin adjusting wheels and fine adjustment. Blackened steel base. In wooden cabinet. Diameter circle 12.7 cm.
Signed on the base "J.H. STEWARD Ltd. | STRAND, LONDON", ca. 1919.

Wollaston goniometer with mirror attachment




Mitscherlich type goniometer
Mitscherlich type goniometer (brass) with telescope, engraved silvered scale (0.5 degree) and vernier read-out with twin adjusting wheels and fine adjustment. Blackened brass base. In glass fronted wooden cabinet. Diameter circle 10.9 cm.
Signed on the base "VOIGT & HOCHGESANG | GÖTTINGEN", second half 19th century.

Mitscherlich type goniometer




Mitscherlich type goniometer
Mitscherlich type goniometer (brass) with telescope, engraved silvered scale (0.5 degree) and vernier read-out with twin adjusting wheels and goniometric head. Blackened brass base. In wooden cabinet. Diameter circle 11 cm.
Signed on the base "Böhm & Wiedemann, München" and marked "M.R.H.N. 101". 1885.
A notice fixed inside the cabinet indicates that this goniometer was bought by the Museum in July 1885, for 298.75 belgian franks, A.F. Renard beeing curator.


Mitscherlich type goniometer




Mitscherlich type goniometer [replica]
Mitscherlich type goniometer (brass) with telescope, engraved silvered scale (0.5 degree) and vernier read-out with twin adjusting wheels and goniometric head. Blackened brass base. Diameter circle 10.5 cm.
Signed on the base "Böhm & Wiedemann, München" and numbered # 17 (part of a series numbered 1 to 25).

Mitscherlich type goniometer




Mitscherlich type goniometer
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.
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.



Mitscherlich type goniometer