74 
Dr. STEVENS also described some features of the geology 
of the cafion of New river, in West Virginia, referring par- 
ticularly to the existence of three seams of coal, the upper 
one quite good, exposed on the south side of the river, above 
the red Umbral shales, which occupy the base of the caiion, 
and the true conglomerate, (No. xii). 
These he thought, could scarcely be the same as the Sub- 
carboniferous coals found in Rockingham Co., Virginia, and 
near the head-waters of the Potomac. 
Above the conglomerate (No. xii.), there are four regular 
coal seams exposed, at the same locality, between White Oak 
and Big Sewall mountains; these are traceable on both sides 
of the river. The general dip of the beds is here some 
12° west. 
November 10th, 1878. Chemical Section. 
Dr. B. N. Martin in the chair; eleven persons present. 
Dr. H. C. Botton exhibited specimens of the pitchblende 
from Georgetown, Nevada, whence it has been obtained in 
large quantities, and gave some account of the mode of its 
occurrence. He also showed a number of other uranium 
minerals, among them autunite from Limoges, France, torber- 
nite, and artificial specimens of the new compounds Zeunerite, 
Cu0.2U.20;.As.0;+8H20, and uranospinite, Ca0.2U,0;.As.0;+8H:0O 
both of which were originally described and prepared by Dr. 
Winkler. | 
Pror. D. S. MArrin remarked upon the occurrence of the 
uranium phosphates in the gneiss of the Atlantic border, 
especially at the celebrated autunite locality opposite Fair- 
mount, in West Philadelphia. 
