XII. On the heal dissipated by a platinum surface at high temperatures

From the beginning of the century, and more especially of late years, an almost uninterrupted series of papers have appeared on the above subject. Unfortunately few of the authors have reduced their measurements to absolute units, thus rendering comparison of the results obtained very difficult. The first part of this paper is to some degree an extension to higher temperatures and pressures of the work so ably done by Dr. Bottomley, whilst the names of Langley, Paschen, Weber, and many others will occur to anyone glancing through the second and third parts.