suggests that Korn's (A. Korn, Neue Mechanische Vorstellungen über die schwarze Strahlung und eine sich aus denselben ergebende Modification des Planckschen Verteilungsgesetzes, Phys. Zeitschr., 14, p. 632) radiation formula fits the facts as well as that of Planck.
H. A. Callendar, Note on Radiation and Specific Heat, Phil. Mag., 26, p. 787, has also suggested a radiation formula that fits the data well. Both Korn's and Callendar's formulæ conform to Wien's displacement law and degenerate for large values of into the Rayleigh-Jeans, and for small values of into Wien's radiation law. Whether Planck's law or one of these is the correct law, and whether, if either of the others should prove to be right, it would eliminate the necessity of the adoption of the quantum theory, are questions as yet undecided. Both Korn and Callendar have promised in their papers to follow them by further ones.
ERRATA
Page 77. The last sentence of [sect:77.] Sec. 77 should be replaced by: The corresponding additional terms may, however, be omitted here without appreciable error, since the correction caused by them would consist merely of the addition to the energy change here calculated of a comparatively infinitesimal energy change of the same kind with an external work that is infinitesimal of the second order.
Page 83. Insert at the end of [sect:84a.] Sec. 84a: These laws hold for any original distribution of energy whatever; hence, e.g., an originally monochromatic radiation remains monochromatic during the process described, its color changing in the way stated.