1907.] NATURAL SCIENCES OF PHILADELPHIA. 573 



MlNEUAL(3C;iCAL AND CiKOLOfllCAL SECTION. 



The Section lias this season continued its meetings and excursions 

 with renewed vigor and success. 



There have been nine meetings, witii an average attendance of ten. 

 Communications were made by .Mr. lA'iiwood F. Garrison on gold in 

 pegmatite and related rocks, and on metallic sulphides in volcanic tuffs; 

 by .Mr. K. T. Wherry on luminescent minerals, and on his summer 

 observations in northern New Jersey; by .Mr. T. Chalkley Palmer on 

 the geography and geology of the region around Richmond, Va. ; by 

 B. S. Lyman on a trip to the Philippines, and on a new rock-section 

 grinding machine; by Dr. Florence Bascom on some Mexican volca- 

 noes; by Dr. William J. Sinclair on the geology of the Yosemitc ^'alley. 

 There were a number of shorter communications, besides active discus- 

 sions. 



There were nine field excursions, with an average attendance of 

 over twenty-eight. The parties examined: (1) The structure of 

 Plymouth Valley, between Camp Hill and Chestnut Hill, Montgomery 

 County; (2) The crystalline rocks and their minerals near i\Iedia, 

 Delaware County; (3) The structure of Plymouth A'alley, between 

 Fort Washington and Glenside, Montgomery County; (4) The crys- 

 talline rocks and their minerals between Swarthmore and Lansdowne, 

 Delaware County; (5) The Cambrian and Precambrian roclcs between 

 Edge Hill and Paper Mills, Montgomery County; (6) The New Red 

 rocks in the Perkiomen Valley, Montgomery County; (7) The crystal- 

 line rocks between Chester and Morgan Station, Delaw^are county; (8) 

 The New Red and Cambrian conglomerates betw^een Yardley and Falls- 

 ington, Bucks County; (9) The crystalline rocks and their minerals 

 between Bethayres and Bustleton, Montgomery and Philadelphia 

 Counties. The excursions are occasionally enlivened by interesting 

 and instructive discussions of the phenomena observed. 



The membership of the Section has increased by two associates, at 

 least one of whom will doubtless next month become a member. 

 Another associate has already this year become a member. 



The following officers of the Section have been elected for the year 

 1908: 



Director, ..... Benjamin Smith Lyman. 



Vice-Director, George ^'aux, Jr. 



Recorder and Secretary, Edgar T. Wherry. 



Treasurer, Miss Emma Walter. 



Conservator, Frank J. Keeley. 



Respectfully submitted by order of the Section, 



Benjamin Smith Lyman, Director. 



