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Doncaster, South Yorkshire - Clock Corner. Good example of overhead catenary wires feeding power to the trasm running on the tramlnes below. Date: 1939
Electric tram. Engraving, 19th century
Electric streetcar. Nineteenth-century colored engraving
BERNOULLI, Johann (1667-1748). Swiss mathematician. Development of infinitesimal calculus. Catenary solution Bernoullis rule. Engraving