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accurate tuning aether ALFRED H analogous to increasing apparatus battery break called charging the jar closed condenser circuit coherer connected discharging the jar disturbance elec electric waves electrical circuit electrical constants electrical machine electrical rest equation example the medium EXPLANATION OF WIRELESS feeble radiator ground guitar string Hertz high resistance induction coil intensity intersection of xy jar is oscillatory less sensitive receiver Leyden jar light waves magnetic field mechanical analogue number of turns open system pendulum persistent oscillator phenomenon of interference plate condenser plugs positively charged coating rapidly damped receiving station receiving system relay represents the vibrations secondary coil self-induction sending station sending system set up vibra sether shown in fig simple harmonic motion simplest form spark gap spheres stopcock terminals ac Tesla coil tical tion trains of waves transference of matter transmitter tube tuning fork vertical wire vibrating body wave motion waves sent waves succeed wireless telegraphy
Page 5 - E is the scape-wheel driven by the force of the clock-weight or spring, and mn the escapement, moved by the forked arm...
Page 1 - ... two bodies. The body sending out energy disturbs the medium contiguous to it, which disturbance is communicated to adjacent parts of the medium, and so the movement is propagated outward from the sending body through the medium until some other body is affected.
Page 3 - It is commonly observed that a vibrating body sets up vibrations in another body, as for instance when one tuning fork responds to the vibrations of another when the tuning forks have the same note, or are in tune.
Page 1 - In this kind of telegraphy a sending station is equipped with an apparatus for generating and transmitting electric waves and a receiving station is equipped with apparatus which will enable it to detect these waves.
Page 5 - I sists of a wide-necked bottle or jar, coated inside and out with tinfoil to within a few inches of the top.
Page 3 - ... have the same note, or are in tune. The transmission of messages by wireless telegraphy is effected in much the same way.
Page 1 - ... by the propagation of energy from point to point through a medium which fills the space between the two bodies.
Page 1 - ... wave motion. When the clapper strikes the lip of a bell it starts the lip into vibrations which in turn cause waves in the air.