19th Nov, 2020 12:00

Fine Photographica & Instruments of Science

 
  Lot 49
 

A Max Kohl Tone Variator

German, c.1900, signed 'Max Kohl, Chemnitz, D. R. G. M. No.189710', constructed of lacquered brass with engraved graduated geared wheel to front, with cam and follower adjusting piston

Note: German psychologist William Stern invented the tone variator in 1897 to study human sensitivity to changes in pitch. German, c.1900, signed 'Max Kohl, Chemnitz, D. R. G. M. No.189710', constructed of lacquered brass with engraved graduated geared wheel to front, with cam and follower adjusting piston

Sold for £719

Result plus buyers premium


 

German, c.1900, signed 'Max Kohl, Chemnitz, D. R. G. M. No.189710', constructed of lacquered brass with engraved graduated geared wheel to front, with cam and follower adjusting piston

Note: German psychologist William Stern invented the tone variator in 1897 to study human sensitivity to changes in pitch. German, c.1900, signed 'Max Kohl, Chemnitz, D. R. G. M. No.189710', constructed of lacquered brass with engraved graduated geared wheel to front, with cam and follower adjusting piston

Auction: Fine Photographica & Instruments of Science, 19th Nov, 2020

Viewing Location:

8 Rivermead
Pipers Way
THATCHAM
RG19 4EP

Important Information: Non-Attended Sale On-Line, Telephone & Commission Bids Only

Viewing

Viewing by appointment from 1st November 2020

Contact 020 3086 8550

View all lots in this sale

Images *

Drag and drop .jpg images here to upload, or click here to select images.