The distribution of blue and violet light in the corona on August 30, 1905, as derived from photographs taken at Kalaa-es-Senam, Tunisia

Abstract

In order to elucidate this divergence in the effect produced under as nearly as practicable similar circumstances upon mica mill-wheels on the one hand, and aluminium wheels on the other, further research seems necessary, but it would appear very probable that the heat insulating properties of mica, which would enable the two sides of a vane of this material to remain at widely different temperatures, and the high conductivity of aluminium for heat, which would not allow of such temperature differences, have an important bearing on this question.] e and Violet Light in the Corona. 395