CONTENTS. 



these planets Their volumes Question of habitability con- 

 tinued. 21. Proportionate population, if inhabited. 22. Inves- 

 tigation of physical causes incompatible with their being habitable 

 globes. 23. Application of such causes to Jupiter, and reasoning 

 thereon Necessity of organised world being different from that on 

 the earth. 24. Comparative volume and density of the Earth 

 and Jupiter. 25. Comparison of relative quantities of gravitating 

 matter in Saturn, Uranus, and Neptune, and in the Earth and 

 of density. 26. Comparative weights of bodies placed upon such 

 planets and on the Earth. 27. General results of inquiry as to 

 the habitability of these planets. 28. Atmosphere of these 

 planets. 29. Their diurnal revolution General observations on 

 rotation and their results Position of axis of rotation . .17 



CHAP. III. 1. Diurnal rotation of Uranus. 2. Inclination of the 

 axes and limitation of the seasons on the Major planets. 3. 

 Jovian zones and climates. 4. Saturnian. 5. Short days and 

 nights of Major planets. 6. Lightness of their materials. 7. 

 Oceans and seas must consist of a liquid lighter than water. 

 8. Jovian, Saturnian, and Uranian years. 9. Effects of diurnal 

 rotation on the distribution of clouds. 10. These effects more 

 conspicuous in the Major planets. 11. Manifested by the belts. 

 12. Telescopic appearance of Jupiter. 13. Herschel and Madler's 

 telescopic views of Jupiter. 14. Jupiter elliptical in form. 

 15. Discovery of Jupiter's moons. 16. Short months. 17. 

 Lunar eclipses. 18. Telescopic appearance of Jupiter's satel- 

 lites. 19. As seen from Jupiter. 20. The Saturnian system. 

 21. Atmosphere and moons 33 



CHAP. IV. 1. Apparent magnitudes of the moons as seen from 

 Saturn. 2. Their phases Short Saturnian months. 3. Solar 

 and lunar eclipses. 4. Discovery of the rings. 5. Phases of the 

 rings as seen from the earth. 6. Their appearance when seen 

 edgeways in 1848 Schmidt's drawings of them. 7. Mountains 

 upon them. 8. Their dimensions. 9. Discovery of the obscure 

 semi-reflective rings. 10. Dawes' telescopic view of the planet 

 and rings. 11. Appearance of the rings as seen from Saturn. 

 12. Errors committed on this subject by Bode, Herschel, Madler, 

 and others. 13. Correction of these errors. 14. Appearance 

 of rings will vary with the latitude of the observer. 15. Illus- 

 trative diagrams. 16. Recapitulation. 17. No difficulty can 

 arise in admitting the possibility of differently organised tribes 

 on the different planets. 18. The sun, its physical character 

 incompatible with habitability. 19. The moon not habitable. 

 20. Nor the satellites. 21. Comets not habitable. 22. The 

 planetoids or asteroids 49 



WEATHER PROGNOSTICS. 



1. Popular errors as to meteorological phenomena. 2. Weather 

 almanacks, their absurdities Herschel's Weather Table 

 Murphy's Almanack. 3. Influence of the moon on the weather 



