24 ANNUAL REPORT OF THE 



graphic enlargements, and of new weather maps, the latter 

 enlarged for lecture purposes and illustrating special weather 

 types, has been added to the teaching collection. Special atten- 

 tion has been paid to securing photographs and lantern slides of 

 meteorological phenomena of recent occurrence. The collection 

 of slides for use in the courses in Meteorology and Climatology 

 is now well supplied. During the year two investigations carried 

 out by students in the course Geology 20e (Advanced Climatology) 

 have been published, as follows : Mean monthly and annual 

 relative humidity charts of the United States, by Kenneth S. 

 Johnson, '07, in the Report of the South African association for 

 the advancement of science, 1906, 161-168 ; " Fog on the New- 

 foundland Banks, by C. T. Brodrick, '07, in the Monthly 

 weather review, Vol. 35, 1907, 76-78. Professor Ward has 

 completed the manuscript of his new book, Climate, for The 

 Science series. 



Professor Wood worth reports that with Professors Davis and 

 Wolff he gave the lectures to the class in Geology 4, the labora- 

 tory and field work of which was carried on under his guidance 

 by Messrs. Eggleston, Lahee, and F. H. Sawyer. It is felt by 

 the instructors and the students in this course that the field 

 parties should be split up into smaller groups. For some years 

 these field parties have included thirty-two students, too many 

 for the effective instruction which one man can give. All the 

 available force which we have been able to command has been 

 devoted to this work. Were the number of students reduced to 

 ten, as is now the case in Course 5, a great gain would be made. 

 To accomplish this reduction would require an increase in the 

 number of assistants in Geology 4 during October and November 

 from two men to six. It is probable that temporary field aids 

 drawn from the graduate and other advanced students in geology 

 could be provided for this work at a cost of $140. Course 5, the 

 elements of historical geology, was given for the second time, 

 with the assistance of Mr. Eggleston and the additional aid of 

 Dr. Mansfield and Mr. Lahee in the field. The field localities 

 chosen for this course lie as far away as Attleboro and Worcester, 

 requiring an additional expenditure for transportation about equal 

 to the fee of the course, but we believe the instructive quality of 

 the localities amply repay the expenditure. Course 8 was given, 

 as last year, with the aid of Dr. Mansfield in the field work. 

 Course 16 was repeated, as in former years, without personally 



