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班傑明富蘭克林與電 Benjamin Franklin and Electricity

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這種雷電能引發火光 This lightning bolt caused a fire

這種雷電能引發火光 This lightning bolt caused a fire

出處: "Civilian defense. Fire prevention. Fires started by lightning are more common in rural sections than in cities. Country homes and other buildings should be protected by lightning rods. A full 24,000 fires and a loss of $8.5 million by lightning were recorded during the last year." 1942 Sept. America from the Great Depression to World War II: Photographs from the FSA-OWI, 1935-1945 from the Library of Congress.