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Updated: May 15, 2025
This current is but momentary; the patient is seen to move, and the body is once more quickened by the life spark. The flow of super-radium has conveyed the spirit of the patient from the small chamber above and released it in the body as it returned, in exactly the same manner as it does with light-waves or sound-waves." "Marvelous!"
The same is true of the powers of hearing, for only a comparatively small portion of the sound-waves reach the Mind of Man even some of the animals hear more than he does. If a man had only one sense he would obtain but a one-sense idea of the outside world. If another sense is added his knowledge is doubled. And so on.
But I now saw that the presence of wires in the composition, though successful with light-waves, was inimical to sound-waves, and it became evident that a firmer but highly sensitive surface was required.
I thereupon made a film of composition, as thin as possible, and stretched it upon the frame of my instrument, as a diaphragm behind the wires, hoping that the sound-waves would pass between the wires, and vibrate the diaphragm, which, being made of composition, would undoubtedly glow, but not more than the film had done.
In a very few turbellaria we find otolith vesicles. These are little sacks in the skin, lined with neuro-epithelial cells and having in the middle a little concretion of carbonate of lime hung on rather a stiffer hair, like a clapper in a bell. Such organs serve in higher animals as organs of hearing, for the sensory hairs are set in vibration by the sound-waves.
The blood flows rhythmically, the heart its metronome; the moving limbs weave patterns; the voice stirs into radiating sound-waves that pool of silence which we call the air. "Thou canst not wave thy staff in air, Or dip thy paddle in the lake, But it carves the bow of beauty there, And ripples in rhyme the oar forsake."
These impulses, according to Bell's theory, correspond in form to the sound-waves, and, passing over the line, energize the magnet coil at the receiving end, thus giving rise to corresponding variations in magnetism by reason of which the receiving diaphragm is similarly vibrated so as to reproduce the sounds.
When those waves strike the listener's ear, he seems to hear the speaker's exact tones, and so, substantially, he does hear them. The circumstance that electric waves, and not sound-waves, travel over the wires, does not change the quality of the resulting sound in the least. I think you now understand Bell's telephone.
Eyes, ears, and nose all began on the surface, and sank gradually into the head, so as to be surrounded and protected, leaving just opening enough at the surface to allow smells, light-rays, and sound-waves to enter; and all of them have at their bottom, or deepest part, a sensitive patch of surface, which catches the light, or the smells, or the sounds, and sends them by a special nerve to the brain.
The magnets convey the sound-waves in the form of electrical waves, along wires out to the tip of each wing, where the wires hang down a little way. When a message comes in it is caught by a webbing of antennae wires in our wings." "Then I suppose these sound-waves, in other words the words one speaks, run out of the end of these wires into the atmosphere?" "Exactly, sir," agreed Bob.
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