•243 



or flattened in proportion to the increased distance from the central 

 h'ne of fracture. 



It was ascertained, by inslrLimental observation, that this line of 

 dislocation runs parallel with the Caledonia mountain range, which 

 stretches for 80 miles, nearly in a S. W. direction, conformably to 

 the northern coast of the Bay of Fundy. The Caledonia mountain 

 range, it must be stated, is composed of trap, basalt, metamorphic 

 slates, porphyry, sienite and other plutonic rocks. 



An important feature in the Hillsborough vein must not be over- 

 looked. It is the occasional tendency to throw off smaller branches, 

 as in the Asphaltum veins of Cuba. One of the most remarkable in- 

 stances is sketched, at Fig. 4, in the accompanying map ; where the 

 main vein, after ramifying and after receiving and giving off several 

 small branches, reunites in one principal vein as before. The inter- 

 mediate spaces between these branches are occupied by slates and 

 worthless rock, which disturb the arrangements of the miners, and 

 are called by them " horses." 



Mr. Fraley referred to a prevalent opinion in the coal re- 

 gion of Schuylkill county, that the veins of white ash coal un- 

 derlie the red ash veins, which has been confirmed by some 

 recent explorations at St. Clair, in that county. 



The Society next proceeded to the election of Librarian, and 

 Mr. Trego was re-elected. 



The following standing committees were elected. 



Of Finance — Mr. Lea (Chairman), Mr. Wagner, Mr. Fra- 

 ley. 



On the Ha/l—iudge Kane (Chairman), Mr. F. Peale, Mr. 

 .lustice. 



On the Library — Dr. Hays (Chairman), Mr. Campbell, 

 Mr. Ord. 



Of Publication — Mr. Lea (Chairman), Dr. Hays, Mr. J. 

 Francis Fisher. 



A list of the surviving members of the Society was read, 

 l>om which it appears that the number on the first of January, 

 1852, was 361, of whom are resident in the United States 260, 

 and in foreign countries 101. 



The Society then proceeded to ballot for candidates for mem- 

 bership. 



All the other business of the meeting having been disposed 

 VOL. V. — 2 h 



