Magnetism, Seismometry, Shipbuilding

24 minutes

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Features a device that indicates the direction and force of an earthquake. Overviews odometers, the compass, gimbals, intricate differential gears, double-action piston bellows, and continuous flamethrowers. Also relates how rudders, bulkheads, and fore and aft sails enable a ship to sail against the wind.

Media Details

Runtime: 24 minutes

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