26 



ANNUAL KEPORT OF THE 



continued a revision of certain physiographic articles for the En- 

 cyclopaedia Britannica, and devoted some time to the preparation 

 of a laboratory guide to map drawing, for use in elementary schools. 

 Professor Johnson lectured on "The Physical history of the Grand 

 Canon District" before the Appalachian Mountain Club; con- 

 ducted a course of fifteen lectures and laboratory exercises on 

 Economic Geography under the auspices of the Teachers' School 

 of Science, Boston, before a class of about 150 teachers, and gave 

 three other public lectures. He studied the folds and the drainage 

 history of the Allegheny Mountains of West Virginia. 



Dr. Mansfield reports that he gave courses 12 and Mining 28, and 

 in the absence of Professor Woodworth conducted course 8. In 

 course 12 the students made studies of the sedimentary and igneous 

 rocks between Walpole and Sharon, and of the structural relations 

 of the sediments and melaphyres northwest of Hingham. In 

 Mining 28 the students were assigned areas in portions of the sedi- 

 mentary district near Boston. From June, 1908, until February, 

 1909, Dr. Mansfield had charge of the seismograph. During 

 six weeks of the summer he conducted the field course in geology 

 in Montana. Eight students representing six different institutions, 

 and including the following universities : Chicago, Wisconsin, North 

 Carolina, Northwestern, and Colgate, were enrolled in the course. 

 The party travelled on foot, and had two wagons to carry the 

 outfit. A circuit of about 400 miles was completed, including 

 portions of the Gallatin, Madison, and Jefferson ranges, with inter- 

 vening valleys. Geological studies were made en route, and of 

 five localities special reports with maps and sections were required. 

 In the evenings there were frequent lectures on historical geology, 

 and at the end of the course a written examination was given. 

 Representatives of nearly all the great geological periods were 

 studied, together with a considerable variety of igneous and meta- 

 morphic rocks. Interesting structural and physiographic features 

 were also noted. 



Publications. August 1, 1908- July 31, 1909. 



Johnson, D. W. — Harvard map projections. Mercator, conic, 

 orthographic, and globular projections of meridians and 

 parallels, for use in map drawing in the schools. Boston, 

 J. L. Haminett & Co., 1909. 

 Memory map drawing. Pop. educator, 1909, vol. 26, p. 27. 



