Geology is a science of such rapid growth that no apology is expected when from time to time a new textbookapology textbook is added to those already in the field. The presentis present work, however, is the outcome of the need of a text-book ofwork, of very simple outline, in which causes and their consequencesvery consequences should be knit together as closely as possible,mdash;a needshould need long felt by the author in his teaching, and perhaps bylong by other teachers also. Th e author has ventured, therefore, toother to depart from the common usage which subdivides geologydepart geology into a number of departments,mdash;dynamical, structural, physiographic, and historical,mdash;and to treat in immediatephysiographic, immediate connection with each geological process the land formsconnection forms and the rock structures which it has produced.
