... except in the direction of other spheres These theories throw new light upon the character and extent of the atmosphere of the moon and planets, and the consequent availability of those and other ... position at the present day The 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 ... orderly manner, certain of my own theories of the Great Physical Forces In these theories will be comprised the identity of those forces, the intimate and essential nature of sunlight, sun-heat,...