116 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
and East Douglas, the former occupying two days, the latter one. 
The entire attendance in this course was 130, average 27.5 ; average 
exclusive of stormy days, 32.8. The spring course for the present 
year has just begun, one lesson having been given at this writing, 
with an attendance of 42. 
A laboratory course in lithology was begun on December 7, 1895, 
and finished on March 28, 1896; this consisted of fifteen lessons of 
two hours each. The work was in direct continuation of the course 
in mineralogy of last year, and was essentially to the same class. 
112 reserved seats with specimens were provided, and that number 
of (A) tickets given out. General admission or (B) tickets to the 
number of eight were also given, making 120 in all. The average 
attendance for the course was 92.67. The method of instruction 
was so arranged as to follow the classification in the collections of 
the Society, and consisted of both laboratory work and lectures, 
with specimens directly in hand. The class were required to 
become familiar with all the common rocks and rock-forming min¬ 
erals, with a thorough discussion of their origin and mutual relations. 
Examinations were given at each exercise, covering portions of all 
the subjects previously passed over, consisting of questions and 
identification of specimens. A final examination was held, and 
essays were also required to be handed in at the beginning of the 
next course. Two lectures on chemical geology were given after 
the examination for the regular course in lithology, so that 17 
lectures in all of two hours each were given. 1 
Very much to the gratification of the Curator and of his former 
class, Dr. Robert W. Greenleaf consented to begin a new course on 
botany. Fifty persons were admitted to the class, and the average 
attendance was thirty-eight. The exercises consisted of a brief 
written examination on the work of the preceding week, a lecture 
demonstration, and laboratory work. A written examination was 
held at the close of the course. It was taken by thirty-two persons, 
of whom twelve passed with honor, seven with credit, and thirteen 
1 As a direct outcome of this work with teachers, Mr. Barton also gave twelve free 
lectures at the Cyclorama of the volcano of Kilauea in June, 1805, to teachers and pupils 
of schools in and near Boston. The manager kindly allowed a half-rate of admission and 
sent notices to those teachers who had formerly been in Mr. Barton’s classes. 200 came 
at one time, and 100 others at a second time. Owing to requests from these teachers, 
Mr. Barton then met and lectured to parties from the following schools : Chauncy Hall, 
Sudbury High, two from Boston Normal, Rice, Mather, Framingham Normal, Agassiz 
Association from Boston, also from Allston, Chautauqua Association, Boston, and the 
Marlboro Natural History Society. No exact record was kept of the attendance at 
these, but it varied from about 12 up to about 75. 
