x CONTENTS. 



CHAPTER PAGE 



^LXX. ANTICIPATIONS OF MAN IN NATURE 331 



XXXI. THE TOOTH OF TIME 338 



XXXII. PRIMEVAL MAN 350 



XXXIII. WlLL THERE BE AN ANIMAL SUPERIOR TO MAN? 373 



XXXIV. POPULAR&quot; BELIEFS IN PERIODICAL CATASTROPHES TO 



THE UNIVERSE 380 



XXXV. SOME THOUGHTS ON PERPETUAL MOTION 390 



XXXVI. WILL THE MOUNTAINS BE LEVELED? ^ 397 



XXXVII. THE^ REIGN OF UNIVERSAL WINTER 402 



XXXVIII. THE.SUN COOLING OFF 408 



XXXIX. THE MACHINERY OF THE HEAVENS RUNNING DOWN... ^17 

 XL. THE CYCLES OF MATTER 428 



APPENDIX T 433 



