On Temperature Radiation
  In this work we compare two blackbody interpretations, those of G. Kirchhoff and M. Planck. We separate the problem of interpreting the blackbody spectrum from that of determining the mechanical equivalent of radiation. Then we propose that, if we set aside characterization of the blackbody, electromagnetism suffices to analyze spectral distribution and leads to interpreting it as determined by the receiver band-pass. 
S.L.Vesely, A.A.Vesely