viii CONTENTS. 



PACK 



blended. Table of different Names given to the same Electro- 

 Mechanical Action transmitted through the five Sensorial 

 Nerves. Imponderable Agents of Nature, so called. The 

 Optic Nerves Tests of Heat. 



CHAPTER IX. 



CORRESPONDING VIBRATIONS TRANSMITTED BY THE 

 ATMOSPHERIC AND THE ELECTRIC ETHER 63 



These are illustrated by the Telephone. Also by the Voice and 

 Musical Sounds. Vibrations converged by Lenses. Light 

 and Sound perpetually transmitted. The differences in Colors 

 and in Musical Tones due to a varied Rapidity of Vibrations. 



Extent of Vibrations recognizable by the Ear. Prismatic 

 Colors. Table of Vibrations in Chromatic Scale of Colors. 



The cessation of Vibrations of the Electric Ether results 

 in Silence, Darkness, and Cold. 



CHAPTER X. 



CONVERTIBILITY OF VIBRATIONS OF HEAT INTO ELECTRIC 

 CURRENTS 68 



Classified as Thermo-Electricity. A Magnetic Needle is more 

 sensitive than a Thermometer. The metallic Bars of aThermo- 



Electric Battery, with Ice applied to one End and a hot Body to 

 the other, represent the Conditions of the Polar and Equatorial 

 Regions of the Earth, exciting the flashing Auroral Currents. 

 Vibration of Molecules of Mercury in Tubes of Thermom- 

 eters produces Expansion as a Test of Temperature. 



CHAPTER XI. 



POPULAR DOCTRINES OF ELECTRIC AND MOLECULAR 

 VIBRATION, DENOTED HEAT 78 



Existing scientific Opinions as to Heat. Mr. Tyndall gives no 

 Solution. Ideas very unsettled. A Warfare of Molecules. 

 " Wild Stone Avalanches." Table of Dynamic Action of 

 Molecules. Continual Vibration of Molecules. Diffusion of 

 the Momentum of the Solar System by Electric Currents and 

 Vibrations. Rotation of Planets excites Currents. Currents 

 counteract Vibrations. Examples of Currents used to produce 

 a Vacuum. The Sun induces Vibrations and causes Rectan- 

 gular Motion. 



