204 



York, Dudley University, Franklin Institute, College of. 

 Pharmacy, Journal of the Medical Sciences, and the Bureau 

 of the Interior. 



Prof. Trego described his recent observations on the iron 

 ore deposits of Buckingham Mountain, cast of Doylestown, 

 in Bucks Co., Pa., when the lower Silurian limestones and 

 Potsdam sandstone appear at the surface through the cov- 

 ering of the New Red, and bring up their characteristic 

 brown hematites. 



Air. Lesley remarked that this exhibition of the ores was 

 of special importance in refutation of the old opinion that, 

 in the back valleys of Middle Pennsylvania, they originated 

 from the erosion of the ferruginous layers of No. IV Middle 

 Silurian, the nearest outcrop of which is forty miles to the 

 north of Doylestown. The iron is undoubtedly a constituent 

 of the Lower Silurian sand-lime deposits, and the ore-beds 

 are co-extensive with the outcrops of the latter. Another im- 

 portant aspect of the exhibition at Doylestown is evident 

 by comparison of it with the emergence of the Potsdam and 

 Calciferous and Trenton formations, carrying the same ores 

 at Chiquesalunga, on the Susquehanna river, ninety miles 

 west of Doylestown, and on the southern edge of the New 

 Red area. In coming times, the iron masters of Pennsyl- 

 vania will moot the question of the possibility of reaching 

 these ores under the covering of New Red, just as the Eng- 

 lish coal operators are at present engaged in discussing the 

 attainability of the Coal Measures, under their New Red 

 areas. 



Prof. Houston spoke of the possible, or rather necessarily 

 certain influence of the heat-radiation of the full moon, pene- 

 trating, as it does the upper fourth or third of the earth's at- 

 mosphere, upon climate, and the duty of meteorologists to 

 take account of it in their theory of storms. He inquired 

 if any of the members present had noted a concurrence of 

 low barometer and full moon, or any tendency in winds to 

 move towards the district underlying a full moon. Putting 

 together the two facts of a highly-heated moon surface with- 



