MARS. 



SKETCH OF THE OUTLINES OF CONTINENTS AND OCEANS, AND THE SNOW RKOION OF 

 THE POLAR CIRCLE OX THS .-OUTHERX HEMISPHERE OF TUK PLANET MARo, 

 THE OBSERVATIONS OK MADLKR. 



THE PLANETS; 



AKE THEY INHABITED WORLDS? 



CHAPTER II. 



1. Uses of an atmosphere colour of sky. 2. Its effects on temperature. 

 3. Planetary atmospheres observable. 4. Clouds visible iu them. 

 5. Hence rain, hail, and snow. 6. Winds manifested on the planets. 

 7. Clouds on Mercury, Venus, and Mars. 8. Continents and 

 oceans. 9. Effect of gravity on planets. 10. Its relation to organised 

 beings. 11. Adaptation of organised beings to the force of gravity 

 12. Gravity on Mercury, Venus, and Mars. 13. Solar system 

 Planets. 14. Number of planets groups. 15. Inner group the 

 twenty-five grouped round the sun. 16. The outer group Jupiter, 

 Saturu, Uranus, and Neptune. 17. Their distances from the suu, 

 from each other, and from the earth. 18. Apparent diameters of 

 Sun's disk as seen from these planets Sun's light and heat. 

 MUSEUM No. 3. o 17 



