III. On the thermo-electricity of ferruginous metals, and on the thermal effects of stretching solid bodies

Abstract

The experiments on the above subjects were made with a thermo-multiplier placed in the vacuum of an air-pump. Its sensibility was such that with the junction antimony and bismuth, a thermometric effect not greater than 1/8000 of a degree Centigrade could be estimated. In determining the thermo-electric position of the metals, it was necessary to increase the resistance of the instrument a hundredfold, by placing in the circuit a coil of fine wire.