CONTENTS. 



PAGE 



INTRODUCTORY . I_IQ 



PHYSICAL PHENOMENA 11-26 



SOUND AND LIGHT 27-53 



ASTRONOMY 54-103 



GEOLOGY AND PALEONTOLOGY . . . . 104-145 



METEOROLOGICAL PHENOMENA 146-169 



PHYSICAL GEOGRAPHY OF THE SEA .... 170-192 



MAGNETISM AND ELECTRICITY 193-219 



THE ELECTRIC TELEGRAPH 220-228 



MISCELLANEA , . 229-241 



