Title
spark gaps
Identifier
ABDNP:200188a
Description
1 large adjustable spark gap with 1/2 mm separation scale from 0 to 100 mm. Balls plated brass; silver coloured. For detecting spark transmissions following Hertz's method.
Date
1890-1920
Format
diameter 50 mm; height ( ebonite posts ) 235 mm
wood, brass, ebonite
Coverage
unknown
Creator
unknown