



THE GREAT K03SE TELESCOPE. 



THE PLANETS : 



ARE THEY INHABITED WORLDS! 



CHAPTEE I. 



1. Aspect of the firmament. 2. Direct evidence on this question not 

 obtained by the telescope. 3. Telescope diminishes distance. 

 4. Evidence from analogy extremely cogent. 5. Consideration of the 

 terrestrial planets. 6. Circumstances which render the earth 

 habitable. 7. Like circumstances to be looked for in the planets. 

 8. Similarity of position and motion of terrestrial planets. 9. Uni- 

 formly supplied with light and heat. 10. Objection of inequality of 

 distance answered. 11. By the effect of atmosphere. 12. Different 

 degrees of light on the planets. 13. Structure of the eye. 14. Its 

 adaptation to different distances. 15. Adaptation of strength of 



MUSEUM, No. 1. 1 



