ILL USTRA TIONS xxiii 



PAGE 



Mount Pelee and the Ruins of St. Pierre ...... 445 



San Miguel Harbor in the Azores ....... 447 



Mount Lassen in Eruption ......... 448 



Mount Hood 449 



Volcanic Necks near Mount Taylor ....... 449 



Crater Lake 450 



Lava Flow in the Hawaiian Islands ....... 450 



A Hawaiian Crater 451 



Cross Section of a Lava Flow ........ 452 



The City of St. Helena . 453 



