ScientificAmerican1903-02-07.jpg Haller-Cunningham Rotary Spark Gap -1913AThumbnailsScientific American 1903-12-26Haller-Cunningham Rotary Spark Gap -1913AThumbnailsScientific American 1903-12-26Haller-Cunningham Rotary Spark Gap -1913AThumbnailsScientific American 1903-12-26Haller-Cunningham Rotary Spark Gap -1913AThumbnailsScientific American 1903-12-26Haller-Cunningham Rotary Spark Gap -1913AThumbnailsScientific American 1903-12-26
Portrait of Guglielmo Marconi.



Source: Steve Kirch, collector, and creator of this website about SCIENTIFIC AMERICAN in the past

Restoration by: magscanner