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Horizontal Circle Goniometers
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Fuess Model I reflecting goniometer
Fuess Model I reflecting goniometer and multipurpose optical instrument. Developed for high precision research to measure variations of crystal angles in a heating unit (missing).
Diameter of graduated circle 25 cm, graduation on solid silver. Four verniers with corresponding read out lenses. Both collimator and observation telescope fitted with Nicol prisms rotatable around its axis and small graduated circles similar to a Jamin/Sénarmont circle.
Signed R.Fuess, Berlin, circa 1870-1875. In 1879 the four read out lenses of the Model I goniometers were replaced by two micrometer microscopes.
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Fuess
Model IV reflecting goniometer
Horizontal circle reflecting goniometer (brass) with covered
graduated circle and vernier read-out (both silver plated),
telescope and collimator with Websky signal, adjusting
wheels, and goniometer head. Blackened brass base. Height
25 cm, circle diameter 15 cm.
Signed on the cover for the graduated circle "R.
Fuess, Berlin - Steglitz", ca. 1900.
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Fuess Model IIa reflecting goniometer
Horizontal circle reflecting goniometer (brass) with covered graduated circle and vernier read-out lenses, telescope with set of interchangeable oculars (in their case), revolving collimator disc with four signals (linear slit, Schrauf signal, round pinhole, Websky slit), adjusting wheels, and goniometer head. Lacquered black painted cast iron base. Height 25 cm, circle diameter 15 cm.
Signed on the cover of the graduated circle "R. Fuess, Steglitz bei Berlin". Inventory numbers IVd49 (scratched on circle cover) and much recent 35589 (written with white paint on a foot). ca. 1900
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Modernized
Fuess Model II reflecting goniometer
Horizontal circle reflecting goniometer (black lacquered
and nickel plated brass) with covered graduated circle
and vernier read-out (both silver plated), telescope and
collimator with Websky signal, adjusting wheels, and goniometer
head. Height 27 cm, circle diameter 15 cm.
Signed on the cover for the graduated circle "R.
Fuess, Berlin - Steglitz", and numbered "7090",
first half 20th century. |
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Fuess Model IVa reflecting goniometer
Horizontal circle reflecting goniometer (brass) with graduated circle and vernier read-out, telescope and collimator with Websky signal, adjusting wheels, and goniometer head. Lacquered black painted cast iron base. Height 23 cm, circle diameter 11.5 cm.
Signed on the graduated circle "R. Fuess | Berlin - Steglitz" and marked: "U . B | M" (Université de Bruxelles | Minéralogie)
ca. 1900
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Fuess Model IVa reflecting goniometer
Horizontal circle reflecting goniometer (brass) with covered graduated circle, vernier read-out, telescope and collimator with Websky signal, adjusting wheels, and goniometer head. Lacquered black painted cast iron base. Height 23 cm, circle diameter 11.5 cm.
Signed on the graduated circle "R. Fuess | Berlin - Steglitz". Inventory numbers IVd47 (scratched on circle cover) and more recent 3558? (written with white paint on a foot), ca. 1900
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Modernized
Fuess Model IVa reflecting goniometer
Horizontal circle reflecting goniometer (black lacquered
and nickel plated brass) with covered graduated circle
and vernier read-out (both silver plated), telescope and
collimator with Websky signal, adjusting wheels, and goniometer
head. Height 22.5 cm, circle diameter 11 cm.
Signed on the cover for the graduated circle "R.
Fuess, Berlin - Steglitz", first half 20th century.
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Darkening
Accessory for Fuess goniometers
Darkening Accessory for Fuess goniometers, lacquered brass
(partly lacquered black) and plush, in its leather-covered,
dark red plush-lined case. Length 16 cm. Fits on Fuess
Models II, III, IV and IVa.
Unsigned, but only made by R. Fuess, ca. 1894. |
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Fuess
reflecting goniometer
Horizontal circle reflecting goniometer (black lacquered
and nickel plated brass) with covered graduated circle
and vernier read-out (both silver plated), telescope and
collimator, adjusting wheels, and goniometer head. Height
29 cm, circle diameter 15.5 cm.
Signed "R. Fuess, Berlin - Steglitz", first half 20th
century. |
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Fuess Goniometer - Universal apparatus
Horizontal circle reflecting goniometer with covered graduated circle and vernier read-out lenses, telescope and collimator. Lacquered brass, nickel plated brass and oxidized brass. Height 39 cm, circle diameter 15 cm. Original wooden case.
Signed « R. FUESS BERLIN-STEGLITZ ». Inventory number 35586 painted on the base, ca. 1900.
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Unsigned,
Swiss made, reflecting goniometer
Horizontal circle reflecting goniometer (lacquered brass)
with graduated circle and vernier read-out (both silver
plated), telescope and collimator with slit, and goniometer
head. Lacquered black steel base. Height 27 cm, circle
diameter 15 cm.
Bearing the label of the retailer: Auer & Co. Zürich.
Unsigned, but made in Geneva, by the Société
Genevoise des Instruments de Physique, ca. 1900.
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Linhof
reflecting goniometer
Horizontal circle reflecting goniometer (brass) with graduated
circle and vernier read-out (both silver plated), telescope
and collimator with Websky signal, adjusting wheels, and
goniometer head. Rectangula blackened steel base. Height
23 cm, circle diameter 12.8 cm.
Signed on the graduated circle "Val. Linhof München
| No 23" ca. 1900. |
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Babinet goniometer, Lerebours et Secretan, Paris
Brass retaining its original laquer, silvered scales, replacement wooden base.
The column is height adjustable, and the circle can be tilted from horizontal to vertical.
Signed Lerebours et Secretan, dating it not later than 1855, when the business was continued by Secretan alone.
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Babinet goniometer / refractometer
Brass circle (21 cm) with fixed collimator and rotatable telescope and central platform with vernier read-outs. Total height : 39 cm. This type of instrument, often called "Babinet’s goniometer", was originally designed for the measurement of interplanar angles and refractive indexes; it was used also for spectroscopic investigations.
Signed "Ph & F Pellin Paris", 2nd half 19th century.
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Modern
Unicam reflecting goniometer
Horizontal circle reflecting goniometer (gray lacquered
cast metal, with polished nickel fittings) with graduated
circle and vernier read-out, telescope and collimator
with Websky signal, and adjusting wheels. Height 29 cm,
circle diameter 15 cm.
Signed "UNICAM INSTRUMENTS (CAMBRIDGE) LTD. | ENGLAND"
and numbered "No. 4398", ca. 1949. |
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