Two Circle Contact Goniometers

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 (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 (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.

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

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.

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.