Griffin & Tatlock Quadrant Electrometer (ca. 1920s)

Early twentieth century quadrant electrometer manufactured by Griffin & Tatlock Ltd. of London England (ca. 19" high).

This example is remarkably completed, the suspension wire (not a quartz fiber), the mirror, and vane are all intact.

A small metal weight can be seen suspended at the end of a wire beneath the vane in the bottom compartment of the electrometer. Normally the weight is immersed in a solution of sulfuric acid inside the small glass Leyden at the bottom. The inside is lined with tin foil to shield the system from stray electrostatic charges.

For additional information about these early quadrant electrometers, click here.

 

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Last updated: 07/25/07
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