Lewis.] 4do [May 15 



Dr. Edward B. Hartsliorne, Philadelphia, June 22, 1885, 

 set. 68. 



Lieut. Henry H. Gorringe, New York, N. Y., July 6, 1885. 



On motion the President was authorized at his discretion to 

 appoint suitable persons to prepare the usual obituary notices. 



The President reported that he had appointed Samuel 

 Wagner, Esq., to prepare an obituary notice of the late Kobert 

 Treat Paine, and that Mr. Wagner had accepted the duty. 



A paper by Prof. Daniel Kirkwood of Bloomington^ Indiana, 

 entitled "The Comet of 1860, and the Meteors of November 

 14th," was presented, for which a plate was authorized. 



Pending nominations Nos. 1049-1068 were read. 



On motion the Society ordered, subject to the approval of 

 the Finance Committee, that a plate should be prepared .to ac- 

 company Dr. Stokes' paper presented at the last meeting at a 

 total cost not to exceed $44. 



On motion the Society resolved to dispense with the meet- 

 ings of August 21st and September 18th, and with that of the 

 Officers and Council on August 14th. 



The rough minutes were read and the Society was adjourned 

 by the President. 



A great Trap Dyke across Southeastern Pennsylvania. 

 By Prof. H. Carvill Leicis. 



{Bead before the American Philosophical Society, May 15, 1SS5.) 



Prof. H. D. Eogers, in his Report on the Geology of Pennsylvania, 

 published in 1858, refers to two trap dykes in Southeastern Pennsylvania. 

 One of these is said to cross the Bethlehem turnpike about a mile above 

 Flourtown, being "about two and one-half miles long, commencing 

 north-west of Springfield township and ranging past Bickell's Mill on the 

 Wissahickon to the School-House further west." * The other dyke is de- 

 scribed as follows : "Another dyke or trap crosses the Schuylkill near 

 Conshohocken ; commencing a little east of the Perkiomen turnpike, about 

 halfway between Barren Hill and Marble Hall, it crosses the Norristown 

 or Ridge turnpike, ranges nearly along the crest of the Conshohocken 



* Geol. of Penna., Rogers, Vol. 1, p. 2U, 1858. 



