[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].