Page:On Radiation.djvu/11

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CONTENTS.
 
 
1. Visible and Invisible Radiation 1
2. Origin and Character of Radiation. The Ether 6
3. The Atomic Theory in reference to the Ether 11
4. Absorption of Radiant Heat by Gases 12
5. Absorption by Iodine. Formation of Invisible Foci 18
6. Visible and Invisible Rays of the Electric Light 21
7. Combustion by Invisible Rays 24
8. Transmutation of Rays. Calorescence 27
9. Deadness of the Optic Nerve to the Calorific Rays 30
10. Persistence of Rays 33
11. Absorption of Radiant Heat by Vapours and Odours 38
12. Aqueous Vapour in relation to Terrestrial Temperatures 41
13. Liquids and their Vapours in relation to Radiant Heat 45
14. Reciprocity of Radiation and Absorption 48
15. Influence of Vibrating Period and Molecular Form. Physical Analysis of the Human Breath 52
16. Summary and Conclusion 57