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单词 platymeter
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platymeter
platymeter n. Obsolete an apparatus for measuring the dielectric constant of a dielectric in the form of a plate or disc.
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the world > matter > physics > electromagnetic radiation > electricity > transmission of electricity, conduction > non-conduction, insulation > [noun] > substance or contrivance > apparatus for measuring
platymeter1872
Schering1926
1855 W. Thomson in 25th Rept. Brit. Assoc., Trans. Sections 22 Electroplatymeter.]
1872 Philos. Trans. 1871 (Royal Soc.) 161 573 The Platymeter, so named by the suggestion of the late Dr. Whewell from its use in the comparisons of electrostatic capacities, was, in a rudimentary form, shown to..the British Association at its Glasgow Meeting in 1855.
1878 Encycl. Brit. VIII. 37/2 In their experiments on the specific inductive capacity of paraffin, Gibson and Barclay employed a method due to Sir William Thomson, in which an instrument called the Platymeter is used in conjunction with the quadrant electrometer.
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