is rate is 34, per an apparatus invented by him, to render weak sounds copper at the temperature of liquid air. 4 coil of eop- degree Centigrade. Now if a cooling of one degree audible, and in 1845 a kind of steam whistle or trumpet per wire was fastened to the top: of a box into which causes a gas… … Temperatures Centigrade. The Conductivity of Lightning Rods.—Some inter- deflection of its magnetic needle is graduated by com- esting experiments bearing on the conductivity of parison with a standard thermometer, so that the effect Fig. 1—ELECTRICAL RESISTANCE OF METALS AT lightning conductors…
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