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<p>The authors criticise the statement made by Jaeger and Lindeck, that the variation of manganin resistances with atmospheric humidity need cause no anxiety to the owners of such resistances. In a particular case at the Bureau of Standards the variation of resistance of a standard coil between Jan, 1 and May 1, 1907, was about 85 parts in 100,000, the change occurring in the course of two weeks of damp weather, with the humidity averaging 64 per cent. The atmospheric conditions were not more severe than frequently prevail in other places, except that the transition from dry to humid was more sudden. The work at the Bureau of Standards tends to confi
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<br>Subjects: apparatus and instruments; measurements and use of instruments; Condensed matter; electronic structure, electrical, magnetic, and optical properties</div>
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