12 



almost entirely in field-work. Besides this regular work in term 



time, an excursion was made in the April recess, with a party of 



eight students, to New Britain, Conn., where attention was given 



to the structure of the Triassic monoclinal ; and the Summer 



School of Geology, while under Mr. Davis's direction, spent ten 



days at the same place in July, and then moved to Catskill, 



N. Y., for a week in August. Both of these stations proved 



to be excellently adapted to the needs of practical field in- 

 struction. 



In December, 1886, Mr. Davis gave five lectures in Boston, on 

 " Problems in Physical Geograph}'," in the Lowell Free Course 

 under the direction of the Boston Society of Natural History. 



The following papers have been published by Mr. Davis : — 



1. Relation of the Coal of Montana to the Older Rocks : a Report on 

 Field-work in 1883 for the Northern Transcontinental Survey, published 

 (1887) in Report of Census of 1880, Vol. XV. pp. 697-712. 



2. The Mechanical Origin of the Triassic Monoclinal in the Connecti- 

 cut Valley. Abstract in Proceedings of the American Association, 1886. 

 In full -in American Journal of Science, November, 1886. 



3. Methods of Instruction in Geological Investigation : an Address 

 read in December, 1886, before the Association of American Naturalists. 

 Revised and published in American Naturalist, September, 1887. 



4. Three brief articles on Cyclones, printed on the Pilot Charts of the 

 North Atlantic, issued by the U. S. Hydrographic Office for August, 

 September, and October, 1886. 



5. Mountain Meteorology. Appalachia, 1886. 



6. The Foehn in the Andes. American Meteorological Journal, May, 

 1887. 



7. Monthly Bulletin of the New England Meteorological Society, from 

 October, 1886, to September, 1887. Edited with assistance of Sergt. 0. N. 

 Oswell, Signal Corps U. S. Army. 



Three rooms have been assigned to the Petrographical Labora- 

 tory, in charge of Mr. Wolff. A large room was used for the 

 lectures and microscopic work and collections, another room for 

 the chemical work, and a room in the basement for making thin 

 sections of rocks with a grinding machine. The laboratory 

 was provided with a large Nachet microscope and other smaller 

 microscopes, an electro-magnet, and other petrographical appa- 

 ratus. In addition to the other collections, the large Brooks 

 collection of American and foreign rocks was received for 



