18 ANNUAL REPORT OF THE 



on the glacial geology of the Franklin sheet, and Mr. H. N. Eaton 

 made a map of the Carboniferous strata and enclosed volcanics, 

 extending east and west of South Attleboro on the Providence 

 quadrangle which together with a brief report is being prepared 

 for publication. Instruction was also given by Professor Wood- 

 worth to students in RadclirTe College. Considerable time was 

 devoted to installing and arranging collections in the exhibition 

 room of the Geological Museum. A still larger share of his time 

 was consumed in his duties as chairman of the Department. 



The laboratory materials were increased as follows : stretched 

 conglomerates from Tiverton and Newport, R. I., collected by 

 G. R. Mansfield ; a collection of Miocene fossils from Yorktown, 

 Va., made by J. B. Woodworth during the April recess ; speci- 

 mens of Knox dolomite from Newport, Tenn., from H. S. Gale, 

 U. S. Geol. Surv. 



July was devoted by Professor Woodworth to the N. Y. geological 

 survey, mainly in completing the glacial map of the Schuylerville 

 quadrangle. On the 23d of August he proceeded by sea to Vera 

 Cruz in order to attend the International Congress of Geologists 

 held in Mexico. 



Professor Jaggar conducted the advanced field courses, Geology 

 22 and Mining 28, as usual, with the assistance of Dr. Mansfield. 

 Students of Course 22 mapped areas hitherto unexplored by this 

 class between Lawrence and Topsfield. A voluntary course of 

 lectures on the Structural Provinces of the United States was 

 given in the autumn of 1905 to advanced students. In February, 

 1906, Professor Jaggar gave a course of four public lectures in 

 the Colonial Theatre, Boston, under the auspices of the Twentieth 

 Century Club, on The Earth as a Living Organism. In the 

 spring of 1906 Mr. H. G. Ferguson made experiments on rill 

 erosion in the laboratory of experimental geology. Mr. Ferguson 

 spent the summer of 1905 in Iceland and has since published 

 in the Journal of Geology an account of Miocene glacial de- 

 posits there. Dr. G. R. Mansfield completed a thesis for the 

 doctorate of Philosophy entitled Origin and Structure of the 

 Roxbury Conglomerate. This essay is to be published as a 

 Bulletin of the Museum. Professor Jaggar finished during the 

 year his share on the text and maps of the Sturgis-Spearfish Folio 

 of the Geologic Atlas of the United States, issued by the U. S. 

 Geological Survey. This production is the outcome of two 

 seasons' field work in the northern mining district of the Black 



