
MUSEUM OF COMPARATIVE ZOOLOGY. 25 
Mr. W. P. Haynes continued his efficient assistance in courses 
4 and 5 in both Harvard and Radcliffe and acted as instructor in 
the summer course S15, as above noted. He completed his 
doctorate thesis on A Contribution to the Geology of the Region 
about Three Forks, Montana, which will be published. 
Mr. D. C. Barton completed his doctorate thesis on Arkose, 
which he had studied in the field, with the aid of a grant from 
the Sheldon Fund. 
Through the generosity of Mr. Sayles, the Division preparator, 
Mr. G. M. Flint, was employed for two months in the collection of 
material for the Geological Museum. Materials were obtained 
illustrating the following localities and subjects:— Berea, Ohio — 
grindstone industry; Fourche Mt., Magnet Cove, and Hot Springs, 
Arkansas — syenites, bauxite, novaculites, graptolitic shales; 
Oklahoma City and Arbuckle Mts., Okla. — economic materials; 
El Paso, Texas — economic materials, Cretaceous fossils; Bisbee, 
Arizona — unique cavern deposits, copper minerals; Tucson, Ariz., 
San Diego, Los Angeles, and San Francisco, Cal., Salt Lake City, 
Utah, Minneapolis, Minn.— economic materials; Tintic district, 
Utah— ores; Cobalt, Ontario — ore, tillite, fossils. About 800 
specimens were collected during this long trip. Mr. Flint con- 
tinued his invaluable services as the officer responsible for the care 
of equipment. | 
