CONTENTS. xv 



WHAT MAY BE SEEN ON THE EARTH, continued '.- 



The Gentians, . . . . . 250 



An Alpine Excursion, . . . . . 256 



The Pimpernel, . . . . . . 260 



The Mole The Staphylinus The Mole Cricket, . . 265 



The Earwig, . . ..',' . . .278 



BOOK IV. AUTUMN. 



CHAP. 



I. WHAT MAY BE SEEN IN THE HEAVENS : 



The Circle, and the uniform Movement of the Stars (accord- 

 ing to the Theory of the Ancients destroyed by Kepler), 289 

 The Solar Constitution, . , . , . . 292 

 Result of recent Astronomical Researches, . . . 296 



II. WHAT MAY BE SEEN ON THE EARTH : 



Chemical action of Light, . . . ' . .31?. 



Action of Heat, .... . 313 

 Arable Land, . . *, . . .318 



Mushrooms or Agarics, ..... 325 

 The Number of Vegetable Species distributed over the 



whole Surface of the Globe, . . ". . . 337 



The Harvest Bug, . . , *. . . 349 



The Cheese Mite, . . . . . . 354 



The Number of Animal Species distributed over the whole 



Surface of the Globe, . . . ' . 356 



What is Chlorophyll? . ... 366 



Carnations and Pinks, . . . . . 371 



The Eglantine and the Convolvulus, . . . 379 



Metamorphosis : a Physico-philosophical Meditation, . 384 



APPENDIX, ........ 405 



