Three Scientific Laboratory Apparatus, 19th/20th Century,
Cast iron, brass and steel devices comprising:

1- A Max Kohl of Chemnitz Tone Variator, ca. 1915, to study human sensitivity to pitch according to William Stern's design. Name inscribed on brass column.

2- A Phillip Harris Ltd. of Birmingham, England Suspended Coil Galvanometer (1943-1980)

3- A Wollaston-Type Goniometer on adjustable feet used to measure the angles between the plane surfaces of crystals.

Kohl Dimensions: H: 15 x W: 5 1/2 x D: 7 3/4 in.

P. Gay, "Wollaston and His Reflecting Goniometer: A Historical Review," Nature, 1966.

Science Museum Group, object 1983-992.
University of Wuerzburg, Inv. No. 00100. Wear and grime commensurate with age and use. Untested devices.