Electrically-Propelled Gyroscope. The Rolling Notion of a Wheel. Wireless Telegraphy on Trains. Electricity on Swedish Trunk Lines., scientific american, 1905-07-29

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Electrically-Propelled Gyroscope. The Rolling Notion of a Wheel. Wireless Telegraphy on Trains. Electricity on Swedish Trunk Lines., scientific american, 1905-07-29

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