18 ANNUAL REPORT OF THE 



Harvard: Geology 5 (in part), Geology 8, Geology 12, Geology 16, 

 a new half-course on the Geology of North America, and Geology 

 20e. At Radcliffe he conducted Geology 4 and 5. Independently 

 of departmental courses, Professor Woodworth guided Mr. 

 Wigglesworth's investigation of the geology of Martha's Vineyard. 



The work of the Harvard Seismographic Station was maintained 

 throughout the year, and the annual report for the year 1915 was 

 prepared. 



Professor Woodworth's time for research has been devoted to 

 the re-survey of the geology of Cape Cod and the Elizabeth Is- 

 lands, Nantucket, Martha's Vineyard, No Man's Land, and Block 

 Island, for the U. S. Geological Survey. A report on the geology 

 of the Cretaceous, Tertiary, Pleistocene, and Recent formations 

 of the region is in preparation. Mr. Gilbert Hart, a student 

 registered in Geology S20, assisted in the field-work on Cape Cod 

 from June 15th to about September 10th. 



Mr. Saville has been conducting experiments upon the nature 

 of coloring matter in water. The results embody a new theory 

 founded upon the colloidal phenomena observed. 



Professor Raymond conducted the courses, Palaeontology 1, 2, 

 3, and 20, and gave one lecture each week in Geology 5. Stu- 

 dents working in Palaeontology 20 prepared the following papers: 

 Mr. Richard M. Field: A preliminary paper on the origin and 

 classification of intraformational conglomerates and breccias. 

 Mr. T. H. Clark: New blastoids and brachiopods from the Rocky 

 Mountains. Mr. John Tothill: On the origin of insects, with a 

 special discussion of their possible descent from trilobites. The 

 last of these papers, though having its inception in this course, 

 was largely worked out at the Bussey Institution. The following 

 papers, finished in Palaeontology 20 in previous years, were 

 published this year: Dr. Donald C. Barton, A revision of the 

 Cheirurinae with notes on their evolution. Washington Univ. 

 Studies, 1916, 3, p. 101-152; Dr. W. P. Haynes, The fauna of the 

 upper Devonian in Montana. Pt. 2, The stratigraphy and the 

 Brachiopoda. Annals Carnegie Museum, 1916, 10, p. 13-54, 

 pi. 3-8. 



During the spring recess, Professor Raymond accompanied a 

 party of students on a visit to the Miocene deposits at York- 

 town, and other places of geological interest in Virginia. 



The more refined methods of work in stratigraphy have shown 

 with increasing force during the last few years the necessity for a 

 careful study of sediments, not only in themselves, but in relation 

 to the enclosed fossils. In an endeavor to make a beginning on 



