Entertained theories erroneous--Their true character--What gives rise to the currents--Purely vito-magnetic phenomena--Philosophical considerations drawn from observation--Whirlwinds, waterspouts, and tornadoes--The Barbadoes--Manufactured wind--Wind within a wind--Winds may not arise from presumed causes--A great cosmical system. CHAPTER X. SUN-SPOTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 Old theories--Degrees of spot-shadow overestimated--What spots are not, and what they are--They are caused by magnetic perturbations--Inconsistency of accepted theories--Figures that are deceptive--Effects of these wonderful phenomena--Mistaken conceptions--May not be tabulated--Unbiassed estimate of their character and location. CHAPTER XI. SOUNDS, AND THEIR TRANSMISSION . . . . . . . . . . . . . . . . . . 77 Essential character and mode of progression--Waves have no act or part in their conveyance. CHAPTER XII. SOME OF THE RESULTS OF THE FOREGOING THEORIES . . . . . . . . . . 79 Extent and character of their influence--Old channels obliterated, and new ones developed--Sentiments changed--Nebular hypothesis--The sun cool, luminous, and habitable--Celestial spectroscopy--Undulatory theories ignored--Light instantaneously transmitted--Telephone--No light nor heat wasted--Extent of the atmosphere of the spheres--The sun's power overestimated. CHAPTER XIII. INFLUENCE OF THE FORCES AS CAUSATION OF DISEASE . . . . . . . . . 84 Meteorological influence--Higher appreciation of the source of disease, and increased efficiency in its treatment. CHAPTER XIV. THE ARTIFICIAL PRODUCTION OF LIGHT, HEAT, AND POWER, AND THEIR UTILIZATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 CHAPTER XV. WHY WAS NOT THIS DISCOVERY SOONER MADE? . . . . . . . . . . . . . 90 Its consummation nearly perfected by many others--Its successful accomplishment plainly foretold by Faraday. APPENDIX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 ILLUSTRATIONS. PAGE I.--THE SOLAR CONE, OR CONE-SPACE . . . . . . . . . . . . . . . 30 II.--THE SEASONS. SUMMER . . . . . . . . . . . . . . . . . . . . 48 III.-- " " WINTER . . . . . . . . . . . . . . . . . . . . 49 IV.--MANUFACTURED WIND. (From DESCHANEL'S Natural Philosophy) . . 66 "If we suppose the sun and fixed stars to be gigantic fountains of magnetic influence, acting upon our globe and its atmosphere, and likewise upon all the other planets, the phenomena of the universe would then become susceptible of the grandest and simplest interpretations."--CROSSLAND. "Are not the sun and fixed stars great earths vehemently hot?"--NEWTON. "Herschel's fixed idea was that the darkness of a spot upon the sun was an indication of a cool and habitable globe."--HUMBOLDT.