Solar Energy: Its Source and Mode Throughout the Universe. E-book. Formato PDF Isaac W. Heysinger   -  Forgotten Books, 2017  - 

The authorities cited in this work include many illustrious names: Proctor, Tyndall, Helmholtz, Langley, Huggins, Newcomb, Young, Flammarion Balfour Stewart, R. Kalley Miller, Herschel, Nichol.