VOLCANOES OF NORTH AMERICA INTRODUCTION IN the present volume the Western Hemisphere is considered as being divided into two portions namely, North and South America. Central America is included in the northern division for the reason that the student of volcanic phenomena finds a break in the volcanic belts which follow the western borders of the two con tinents, at the Isthmus of Darien. The series of active and recently extinct volcanoes forming the major part of the Windward islands, sepa rating the Caribbean Sea from the Atlantic, will not be considered, as it is most intimately associated with the geography and geology of South America. Although Iceland is more closely connected geographically with America than with Europe, its political association with the Old World, and the fact that it has frequently been described by European travellers, make it convenient to omit it from the present discussion. Among the leading physical features of the southern prolongation of the Noith...