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barrenness | barrens | barrenwort | barret | barrette | barretter | barricade | barricaded | barricader | barricado | barrie




barrettern. [OF. bareter to exchange. Cf. Barter.].
     a resistor inserted into a circuit to compensate for changes (such as those arising from temperature fluctuations); a thermal cymoscope.  [Webster 1913 Suppl.]
    " The original form consisted of an extremely fine platinum wire loop attached to terminals and inclosed in a small glass or silver bulb. It operates by increased resistance when subjected to the influence of an electric current. In a later variety, called the liquid barretter, wire is replace by a column of liquid in a very fine capillary tube. A recent version has a resistor composed of an iron wire in a glass bulb containing hydrogen, with the temperature variation of resistance such that the current passing through it remains constant over a wide range of applied voltages."  [Webster 1913 Suppl.]

For further exploring for "barretter" in Webster Dictionary Online

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