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The clear cloak hanging from her shoulders, the ivory face for the night had put out nothing of her but the gleams of her hair made her resemble a shining dream-woman uttering words of wistful inquiry. She disappeared without a sign, leaving Renouard penetrated to the very marrow by the sounds that came from her body like a mysterious resonance of an exquisite instrument. He stood stock still.
Whether this idea was derived more from direct than from sympathetic sensations need not be determined now. It is at any rate certain that a perfectly sung tone gives to the hearer the impression of nasal influence of some kind. The exact nature of this influence has never been determined. It may be air resonance, or sounding-board resonance, or both combined.
Meanwhile the brooding storm was slowly gathering its forces together for an outburst; the bank of cloud had piled itself so high above the western horizon that it had long ago obscured the sun; a weird twilight had fallen upon the scene; the stagnant air had grown even more oppressively hot than at first; not a bird uttered a single note; not an insect raised a chirp; not a leaf stirred; and in the profound silence the roar of the surf on the reef became thunderous in its resonance.
With the knowledge that this all-pervading ether would carry electric waves at the speed of light, that the waves could be set up by the discharge of a spark across a spark-gap in a coil, and that they could be received in another coil in resonance with the first, the establishment of a practical wireless telegraph was not far away.
The spirit of the town, its situation, its history, all reduced it to the secondary part of raising guerillas. It bestowed upon the country this national product in 1827, at the time of the Apostolics, during the Seven Years' War, in 1848, and at other epochs of less resonance in the national history.
Helmholtz's theory of vocal acoustics was fairly simple: The vocal cords vibrate after the manner of membranous reeds; a tone thus produced consists of a fundamental and a series of overtones; vowel and tone quality are determined by the influence of the resonance cavities, which reinforce certain of the overtones with special prominence. This theory is discarded by Prof. Scripture.
Without warning or presage the still evening air was smitten and made softly musical by the pealing of a distant chime, calling vespers to its brothers in Antwerp's hundred belfries; and one by one, far and near, the responses broke out, until it seemed as if the world must be vibrant with silver and brazen melody; until at the last the great bells in the Cathedral spire stirred and grumbled drowsily, then woke to such ringing resonance as dwarfed all the rest and made it seem as nothing.
Thud, thud, thud, came the drum with a vibrating resonance, and for the moment I did not notice two urchins stopping at the railings by me. 'See 'em, said one. 'See what? said the other. 'Why them footmarks bare. Like what you makes in mud. "I looked down and saw the youngsters had stopped and were gaping at the muddy footmarks I had left behind me up the newly whitened steps.
She still smokes her pipe in the chimney-corner. She is of the mountains. She must stay here." He paused, then his words began again dispassionately, and gathered, as he talked, the fiery resonance of the instinctive orator. "If the men who love war, leave lawless countries, who in God's name is to do the work? The order is changing. What does Kipling say about the men who blaze trails?
Just as acoustic resonance may be simple or sympathetic so electric resonance may be simple or sympathetic. Simple acoustic resonance is the direct reinforcement of a simple vibration and this condition is had when a tuning fork is mounted on a sounding box.
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