Abstract
IN order to make a high-frequency oscillator for brass plates, I wound a suitable inductance around a nickel rod twelve inches long and one eighth of an inch in diameter. The inductance was excited at 15,000 vibrations per second from an audio vacuum tube circuit connected through a power amplifier. The nickel rod was in a vertical position and the square Chladni plates were balanced upon it. The figures shown in the photographic reproductions (Fig. 1) were formed in this way.
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COLWELL, R. Chladni Plates at High Frequencies. Nature 133, 258 (1934). https://doi.org/10.1038/133258a0
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DOI: https://doi.org/10.1038/133258a0
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