16 ANNUAL KEPORT OF THE 



Mr. A. W. G. Wilson completed during the year, for publication 

 by the Boston Society of Natural History, his work on the Geology 

 of the Medford Dike. Mr. R. W. Stone, in Course 23, made a 

 field experimental study of Erosion Movements in the Mystic 

 Valley, and supplemented this in the spring by a series of labora- 

 tory experiments on erosion in miniature, which were successful. 

 During the winter a paper on the intrusive character of the 

 melaphyr of Brighton, by H. T. Burr, was published by the 

 Museum of Comparative Zoology. 



Course 17, Experimental Geology, was given to seven students. 

 The laboratory accommodations were extended, and the series of 

 laboratory experiments made more systematic and thorough than 

 heretofore. New experiments were made on erosion, joints, and 

 deformation of strata. There is need of a small outbuilding for 

 high temperature experiments, remote from danger by fire, and it 

 has been suggested that the small building on Jarvis Street, recently 

 used by the Department of Architecture, would well serve this 

 purpose. 



Dr. Jaggar has been appointed, for the U. S. Geological Survey, 

 Assistant Geologist in charge of the Bradshaw Mts. Quadrangle of 

 Northern Arizona. Dr. Palache was appointed his associate in 

 the work of mapping and studying the economic geology of this 

 copper and gold mining district. 



Dr. R A. Daly spent the summer of 1900 in a geographical and 

 geological reconnaissance of the northeast coast of Labrador, a 

 report of which will appear as a bulletin of the Museum. During 

 the first half-year, he conducted the elementary course in Physi- 

 ography (Geology A) and in the second half-year the course on 

 Oceanography (Geology 11). Dr. Daly also gave a course of lec- 

 tures in Radcliffe College on the Physiography of the United States 

 (Geology 6) which was parallel to the course in the same subject 

 given by Professor Davis to students of Harvard University. A 

 beginning was made on the petrographic study of the collections of 

 volcanic island rocks from the Pacific, now systematically arranged 

 in this Museum. In June 1901, Dr. Daly tendered his resignation 

 to the President of the University, in order to assume the position 

 of geologist on the Canadian Commission appointed to remark the 

 boundary between the United States and Canada. 



The committee on the Gardner Collection of photographs 

 (Professors Wood worth and Ward, and Dr. Daly) report that 432 



