That which propels. Specifically the device that propels Keely's air-ship. Also aerial propellor.

Keely's Air-ship

Figure 19.17 - Keely's Air-ship

"Each disc of the polar and depolar groupings in the propeller of the air-ship contains seven pints of hydrogen. In preparing these discs, the hydrogen is submitted to a triple order of vibration. The corpuscular envelopes of the molecules are not enlarged in volume, under their receptive condition, but their velocity of rotation is increased. While under the operation of this transmittive vibration their vortex action is made visible." [Newton of the Mind]

See Also

Acoustic Levitation
Air-ship model
Newton of the Mind
Polar and depolar intermittent accumulator
The Action of Force is Spiro-Vortex
17.15 - Theory of Vibratory Lift for Air-ships

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