On the conduction of heat in rarefied gases and its manometric application. I

Summary Formulae for the conduction of heat in pure gases and in binary mixtures relevant to a tube with a thin, axial heated wire are developed. They cover the region of pressure between that for which the heat conduction is independent of pressure and that for which M. Knudsen's formula is valid. A theory for precision manometry is given and the manometric constants for twenty-five gases have been measured.