... present theories of the transmission of light and sound; of the production of winds, and sun-spots, and of the method of development and dissemination of heat, are in point of fact, unphilosophical ... through quite ten feet of space. Present theories of Supply of Sun-heat. The present theories of the production and dissemination of sun-heat, are simply accepted for want of better, and not because ... boundaries of the solar cone, no light is. [Pg 30] Pl. I. SOLAR CONE. The Sun not Incandescent. The apparent brightness of the sun is owing to the aggregation of the 93,000,000 of miles of this...