1909.] NATURAL SCIENCES OF PHILADELPHIA. 583 



At the annual meeting of the Section the following were elected as 

 officers for the coming year: 



Director, Benjamin H. Smith. 



Vice-Director, Joseph Crawford. 



Secretary and Recorder, . . . Charles S. Williamson. 



Treasurer and Conservator, . . . 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. O. 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 ; Mr. F. J. Keeley, on asteriated 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 Cram 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, 



