Benjamin Franklin (1706-1790)
+ve and –ve charge
1752 Proved storm
clouds are charged
Born Boston, Mass.
Printer, Scientist, Inventor, Civic activist, diplomat & candle maker – also found time to be one of the founding fathers of USA.
Fluent in five languages, invented catheter, swimfins, glass harmonica & bifocal lenses.
Proposed that “Resinous” & “Vitreous” electrical fluid are the same under different pressures, labelled as positive and negative.
1750 Proposed experiment to prove lightning is electricity
1752 Flew kite in ‘storm like’ cloud & gathered charge.
Prof. Richmann (St. Petersburg) RIP
Invented lightning rod.