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High frequency resonator

High frequency resonator

Therapeutics

1900-1920
Rocheford high frequency resonator, with accessories, French, 1880-1910

Rocheford high frequency resonator, with accessori

Therapeutics
Part of a high frequency resonator, comprising base with Spark-gap enclosed in glass vessel and helical copper spring, switch and terminals, French, 1890-1900

Part of a high frequency resonator, comprising bas

Therapeutics

1890-1900