1909.] 
NATURAL SCIENCES OF PHILADELPHIA. 
5S3 
At the annual meeting of the Section the following were elected as 
officers for the coming year: 
Director, 
Vice-Director, 
Secretary and Recorder, 
Treasurer and Conservator . 
Benjamin H. Smith. 
Joseph Crawford. 
Charles S. Williamson. 
Stewardson Brown. 
Respectfully submitted, 
Stewardson Brown, 
Conservator. 
The Mineralogical and Geological Section. 
The Section held seven meetings in 1909, with an average attend- 
ance of six. Communications were made by Prof. 0. C. S. Carter, 
on earthquakes ; Dr. E. T. Wherry, on fossil plants at Holicong, Bucks 
County, with a report on them by Dr. David White ; Mr. T. C. Palmer, 
on minute beryls at Avondale, Delaware County; B. S. Lyman, on 
the need of instrumental surveying in practical geology, and on advan- 
tages of not exaggerating the vertical scale in geological cross-sections; 
Col. Joseph Willcox, on fossil elephants, Glyptodon, manatee and 
horses in Florida; Air. F. J. Keeley, on asteriatecl sapphire from 
Ceylon; Miss E. Walter, on sub-fossil Sequoia in San Francisco. 
The Section also met in conjunction with the Academy on the 
evening of May 18th, and made through its members three communi- 
cations to the meeting. 
There were six field excursions of the Section, with an average 
attendance of about 29. On all the excursions, except the third, the 
parties visited crystalline rocks and their minerals, namely: (1) 
Between Woodlane and Ardmore, Montgomery County; (2) between 
Elwyn and Newtown Square, Delaware County; (3) New Red rocks 
and trapdikes, between Camp Hill and Three Tuns, Montgomery 
County; (4) near Moylan, Strath Haven, Avondale and Crum Creek, 
Delaware County; (5) near Cynwyd, Mill Creek and Bryn Mawr, 
Montgomery County; (6) near Glen Mills, Lenni, Chester County, and 
Blackhorse, Delaware County. 
Besides the meetings and excursions of the Section, there was, by 
its invitation, a numerously attended meeting of geologists of the 
northeastern part of the United States held at the Academy on the 
afternoon and evening of April 23d, at which six highly valuable 
communications were read, followed, the next day, by a very profitable 
field excursion of 23 participants, under the guidance of Prof. Bascom, 
