The T.S.F.: Edison effect in an electric bulb used to detect TSF signals. Anonymous illustration from 1925. Private collection.(The T.S.F.: Edison effect in an electric bulb uses to detect TSF signals. Anonymous illustration from 1925. Private collection.)Anonymous Anonymous |
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Undated · Engraving
· Picture ID: 918305
colour · colours · engraving · physical · lighting · communication · knowledge · ampoule · telegraph · wireless telegraph (t.s.f.) · 20 20th 20th xx xxth 20th century · electricity · bianchetticor · energy · energy |
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