...surrounds the atoms of bodies ; it extends, without solution of continuity, through the humors of the eye. The molecules of luminous bodies are in a state of vibration. The vibrations are taken up by the ether, and transmitted through it in waves. These waves impinging on the retina excite the sensation."...

...surrounds the atoms of bodies ; it extends, without solution of continuity, through the humors of the eye. The molecules of luminous bodies are in a state of vibration. The vibrations are taken up by the ether, and transmitted through it in waves. These waves impinging on the retina excite the sensation."...

...sound : both are undulatory. As sound travels in waves of air. so light travels in waves of ether. " To account for the enormous velocity of propagation in the case of light," writes Dr. Tyndall, -' the substance which transmits it is assumed to be of both extreme elasticity...

...surrounds the atoms of bodies; it extends, without solution of continuity, through the humors of the eye. The molecules of luminous bodies are in a state of vibration. The vibrations are taken up by the ether, and transmitted through it in waves. These waves impinging on the retina excite the sensation...

...greater the elasticity the greater is the velocity, and the less the density the greater is the velocity. To account for the enormous velocity of propagation in the case of light, the substance that transmits it is assumed to have both extreme elasticity and extreme density. This dominance of...

...greater the elasticity the greater the velocity, and the less the density the greater is the velocity. To account for the enormous velocity of propagation...it is assumed to be of both extreme elasticity and of extreme tenuity. This substance is called the Luminiferous ether: It fills space; it surrounds the...