Apparatus has been devised for measuring and measurements made of Thomson coefficients of metals at high temperatures. It is found that in the range from 400°C to the melting point the approximation $\sigma =\beta T$ is adequate for platinum, palladium, copper, and silver but not for gold, molybdenum, and tungsten.

Experimental results for the Peltier coefficients for solid-liquid interfaces of gold, silver, and copper are also reported. An experimental sensitivity of 0.1 millivolt revealed no effect in gold and silver, but + 10.2 millivolts were obtained for copper.

• Received 30 April 1948

DOI:https://doi.org/10.1103/PhysRev.74.479