659 



Stated Meeting, December Sd, 1875. 



Present, 14 members. 



Yice-Presideiit, Mr. Fraley, in the Chair. 



Visitors. Mr. Schwartz of the Detroit Scientific Associa- 

 tion, and Mr. Morgan Hart. 



A letter acknowledging the receipt of Proceedings iTo. 

 94, was received from the Victoria Institute, dated London, 

 Nov. 8th, 1875. 



A communication respecting a so-called Calendarium per- 

 petuum mobile, to be exhibited in 1876 bj M. Kesselmeyer, 

 was received from Mr. C. H. Meyer, Consul for the German 

 Empire at Philadelphia. 



Donations for the Library were received from the ISTether- 

 land Botanical Society ; Cobden Club ; Glasgow Philosophi- 

 cal Society ; Silliman's Journal ; Academy of Natural 

 Sciences ; Penn Monthly ; Journal of Pharmacy ; Mr. Nys- 

 trom ; and Prof. Kerr of North Carolina. 



Mr. Britton exhibited and explained certain improvements 

 in his laboratory burettes. 



Mr. Lesley described the occurrence of certain Carbonifer- 

 ous valleys of erosion, discovered by Prof. Stevenson and 

 Mr. White during the field-work season just closed, in 

 Washington and Greene counties, Pennsylvania, on the hor- 

 izon of the great sand-rock of the Lower Barren Measures, 

 below the Pittsburg coal. 



Mr. Price communicated a memorandum of the places 

 around Philadelphia recently visited by him, where boulders 

 may be seen. This list of points in the present limits of the 

 city may be of historical interest at a future day. 



I have lately visited the following excavations through gravel outside 

 the built area of the city. In all are found pebbles and stones rounded 

 by the action of water, and stones of all sizes up to some hundred 

 pounds, unrounded, angular, and but slightly rubbed. Where the gravel 

 is purest and deepest, and undisturbed, stratification is seen, and at a 

 depth of eight or ten feet a black band of cemented gravel divides the 

 gravel from the fine sand below : 



South side South Street east of new bridge ; south side Woodland Ave- 

 A. P, S. — VOL. XIV. 4g 



