Nearly a year ago I had occasion to speak at a meeting of the Geological Society of Washington on the subject “Geographical Descriptions in Geological Publications,” with special reference to an explanatory method of describing the forms of the lands. In illustration of the principles that seemed to me most important I introduced a brief and technical geographical description of the land forms seen in the Front Range of the Rocky Mountains in central Colorado during an excursion in the summer of 1910, regarding which a fuller account is about to be published in the Annals of the Association of American Geographers; yet at the close of the meeting the feeling prevalent among some of the geologists present seemed to be that my description did not belong under geography, but under geology. The description had seemed to me to belong under geography, and to be indeed as good a . . .