1890 .] 
19 
[Annual Meeting* 
Applications having been made for instruction in Lithology and 
Petrology, a class consisting of thirty persons was formed and a 
course given by Mr. Geo. H. Barton consisting of twenty lessons. 
This series of lessons covered the same ground as that of the reg- 
ular course upon the same subjects given to the students of the 
Mass. Institute of Technology. In the lessons on Lithology a spec- 
imen of each variety of the commoner rocks was placed before each 
student thus enabling him to become fully acquainted with the 
characteristics of these rocks. The lessons on Petrology were il- 
lustrated by numerous charts and diagrams, and also by such speci- 
mens as could be exhibited in the class room. 
In consequence of the lack of funds sufficient to cover the ex- 
pense of this course, a fee of fifty cents per lesson, or ten dollars 
was charged. 
The class consisted of thirty persons and the average attendance 
was thirty. 
Laboratory. 
In addition to the class of teachers in zoology, mentioned above, 
the laboratory has been used by a class in zoology from the Boston 
University under the charge of the Curator and Mr. Van Vleck, 
one in botany and another in physiology from the same institution 
under the sole charge of Mr. Van Vleck. 
Lecture Room. 
It may be well also to notice that the use of this room is increas- 
ing. It has been hired during the past year by the Woman’s Edu- 
cation Association for a series of lectures, by the Psychological 
Society for several evenings, by the Folk Lore Society for several 
meetings and by other parties. This custom has grown up grad- 
ually, although not heretofore noticed in these reports. 
Report on the Secretary’s Department and the Library, by 
J. Walter Fewkes, Secretary. 
During the past year no important event has occurred in the 
departments under the charge of the Secretary and Librarian. 
