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6 That the ether, apart from being supersensibly seen, is also heard, was empirically known to Goethe. 7 By attending Chladni's lectures on his discovery in Paris the French physicist Savart became acquainted with this phenomenon and devoted himself to its study. Chladni and Savart together published a great number of these figures.
Schroeter and Maedler minutely examined the moon and planets; Struve, the fixed stars. Fraunhofer improved the telescope. Chladni first investigated the nature of fiery meteors and brought the study of acoustics to perfection. Alexander von Humboldt immensely promoted the observation of the changes of the atmosphere and the general knowledge of the nature of the earth.
The only objects visible in the interior are a few low ridges on the E. side, and a number of long spurs running out from the wall on the N. towards the centre of the floor. Murchison A is named CHLADNI by Lohrmann. PALLAS. A fine ring-plain, about 32 miles in diameter, forming with Murchison an especially beautiful telescopic object under suitable illumination.
At midnight began the modish music of the dance, and groups of beautiful girls moved like the atoms of Chladni on the vibrating crystal, with their partners, to the sound of harps and violins, in pleasing figures or inebriating spirals.
Each of these coruscating meteors, he affirmed, must tell of the ignition of a bit of cosmic matter entering the earth's atmosphere. Such wandering bits of matter might be the fragments of shattered worlds, or, as Chladni thought more probable, merely aggregations of "world stuff" never hitherto connected with any large planetary mass. Naturally enough, so unique a view met with very scant favor.
But Halley had already entertained the opinion of their cosmical origin; and Chladni in 1794 formally broached the theory that space is filled with minute circulating atoms, which, drawn by the earth's attraction, and ignited by friction in its gaseous envelope, produce the luminous effects so frequently witnessed.
And one speculator of the time took a step even more daring, urging that the aerolites were neither of telluric nor selenitic origin, nor yet children of the sun, as the old Greeks had, many of them, contended, but that they are visitants from the depths of cosmic space. This bold speculator was the distinguished German physicist Ernst F. F. Chladni, a man of no small repute in his day.
Some of the data collected, however, served only to perplex opinion, and even caused Chladni temporarily to renounce his. Many high authorities, headed by Laplace in 1802, declared for the lunar-volcanic origin of meteorites; but thought on the subject was turbid, and inquiry seemed only to stir up the mud of ignorance.
When, a few years later, Chladni of Wittenberg, the founder of scientific acoustics, began to admit the phenomenon and to believe in the existence of aërolites, he was stigmatized as "a man who was ignorant of every law and who did not consider the damage he was doing in the moral world"; and one savant declared that "if he had himself seen iron fall from the sky at his own feet, he would not have believed it."
In 1776, Marpurg, for the same tone, gives one hundred and twenty-five vibrations. Chladni, in the year 1802, calculated its vibrations as a hundred and twenty-eight, twenty years later as a hundred and thirty-six to a hundred and thirty-eight to the second. And since then we have, no doubt, gone noticeably higher!
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