image



Two Circle Contact Goniometers


view close up click images for more information


Stoe two circle contact goniometer
Stoe two circle contact goniometer (lacquered brass and blackened brass base) with graduated circles and vernier read-out, a steel rod with contact plane and specimen holder on a ball and socket joint. Vertical circle 15.5 cm.
Signed on the vertical circle "Stoe & Cie | Fritz Rheinheimer | Heidelberg", first half 20th century.
The present owner bought the goniometer from the widow of Richard Venable Gaines (1917-1999).
Mounted on the specimen holder is a wooden crystal model of datolite.



Stoe two circle contact goniometer




Stoe two circle contact goniometer
Stoe two circle contact goniometer (nickel plated brass and blackened brass base) with graduated circles and vernier read-out, a steel rod with contact plane and specimen holder on a ball and socket joint. Height 19.5 cm.
Signed on the vertical circle "Stoe & Cie | Fritz Rheinheimer | Heidelberg" and "Made | in | Germany", first half 20th century.

Similar instruments exist with a slightly different signature on the vertical circle "Stoe & Cie | F. Rheinheimer | Heidelberg" and "Made in | Germany".

Stoe two circle contact goniometer




Stoe two circle contact goniometer
Stoe two circle contact goniometer (nickel plated brass and grayish enameled brass base) with graduated circles and vernier read-out, a steel rod with contact plane and specimen holder on a ball and socket joint. Height 19.5 cm.
Signed on the vertical circle "Stoe & Cie | G.m.b.H. | Heidelberg" and "Made in | Germany", middle of 20th century.



Stoe two circle contact goniometer




Unsigned two circle contact goniometer
Two circle contact goniometer (lacquered, partly silver plated brass and blackened brass base) with graduated circles and vernier read-out, a steel rod with contact plane and specimen holder on a ball and socket joint. Height 19.5 cm.
Unsigned, beginning 20th century


Unsigned two circle contact goniometer




Böhm & Wiedemann two circle contact goniometer [replica]
Replica of a two circle contact goniometer (lacquered brass and blackened brass base) with graduated circles and vernier read-out, a rod with contact plane and specimen holder on a ball and socket joint. Vertical circle 15 cm, height 22 cm.
Signed on the horizontal circle "Böhm & Wiedemann, München", ca. 1990.



Böhm & Wiedemann two circle contact goniometer [replica]




Fuess two circle crystal-grinding goniometer
Two circle goniometer for making plaster crystal models. Lacquered brass and blackened brass with graduated circles (12 and 10 cm) and vernier read-out, steel specimen holder and steel rod with grinding plate. Height: 30.5 cm.
Signed "R. Fuess Steglitz - Berlin", early 20th century.

Fuess two circle crystal-grinding goniometer