365
The Poles 367

CHAPTER X

THE STARRY HEAVENS 373

The Moon 377
The Sun 382
The Planets 387
Mercury 388
Venus 390
The Earth 391
Mars 392
The Minor Planets 393
Jupiter 394
Saturn 395
Uranus 396
Neptune 397
Origin of the Planetary System 398
Comets 401
Shooting Stars 406
The Stars 410
Nebulae 425

ILLUSTRATIONS

FIG. PAGE

1. Larva of Choerocampa porcellus 53

2. Bougainvillea fruticosa; natural size. (After Allman) 107

3. Do. do. magnified 108

4. Do. do. Medusa-form 109

5. Medusa aurita, and progressive stages of development.
(After Steenstrup) 110

6. White Dead-nettle 124

7. Do. 125

8. Do. 125

9. Salvia 127

10. Do. 127

11. Do. 127

12. Primrose 131

13. Do. 131

14. Arum 135

15. Twig of Beech 140

16. Arrangement of leaves in Acer platanoides 142

17. Diagram to illustrate the formation of Mountain Chains 216

18. Section across the Jura from Brenets to Neuchatel. (After Jaccard) 219

19. Section from the Spitzen across the Brunn