The Thermal Conductivity of Air . acoil in a thermally insulated water tank, thence through a lagged pipe tothe apparatus. The apparatus was made air-tight by a ring of stout rubber, bound to theupper plate and to the circulator by steel tapes tightened by tangentialbolts. The wires from the two lower plates were led out through rubbertubes vulcanised to the rubber ring, and the tubes were tightly bound withcord. Leaks through the upper plate bolt-holes were stopped by a beeswaxand resin mixture sucked in by diminished pressure. Once the constants of the apparatus had been determined, the meas
The Thermal Conductivity of Air . acoil in a thermally insulated water tank, thence through a lagged pipe tothe apparatus. The apparatus was made air-tight by a ring of stout rubber, bound to theupper plate and to the circulator by steel tapes tightened by tangentialbolts. The wires from the two lower plates were led out through rubbertubes vulcanised to the rubber ring, and the tubes were tightly bound withcord. Leaks through the upper plate bolt-holes were stopped by a beeswaxand resin mixture sucked in by diminished pressure. Once the constants of the apparatus had been determined, the measure-ments required in the course of an experiment were all potential measure-ments. As it was important that these readings should be taken quicklyand without handling the wires, a switch was designed by which any of the 196 Mr. E. 0. Hercus and Prof. T. H. Laby. desired connections to the potentiometer might be made. The accompanyingcircuit plan (fig. 3) shows the wiring arrangements. Points lettered with t> *|l|l|—m—/vww. Con
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectproceed, bookyear1919
