| [Intimate Nature of the Forces] | [24] |
[Sunlight and sun-heat]—[The great law of conservation]—[How the spheres are constructed]—[The great earth-core and its functions]—[The grand magnetic circuit.]
[CHAPTER IV.]
| [Sunlight, its Source and Nature] | [29] |
[Its limits]—[The solar cone]—[The sun not incandescent]—[New hypothesis]—[No borrowed light]—[The sun dependent]—[Light as a substance]—[Velocity of Light].
[CHAPTER V.]
| [Sun-Heat, its Source and Limits] | [35] |
[Tendencies to unsettle in science]—[Present theories]—[True source]—[Earth's part in the process]—[Sun's part]—[New philosophy]—[Old phenomena and new interpretations]—[Auroræ]—[Well understood processes in confirmation]—[The ordinary battery]—[The Great Sun Battery]—[Heat without combustion]—[Inter-currents]—[Solution of the problem].