150 
empressions of angiospermous leaves. No plants of this kind 
were known to exist during the Trias, or before the Creta- 
ceous ; but we know of no such Cretaceous or Tertiary Sand- 
stone on the North American continent. The mass from 
which this specimen was taken was a bowlder and the 
associated transported blocks were granite, porphyry, green- 
stone, dolomite, &c. plainly referable to well-known localities 
north of New York. But no such Sandstone as this was 
known and it became a matter of extreme interest to ascer- 
tain what was its origin. 
Pror. A. M. Epwarps exhibited a number of specimens 
of Sandstones, procured by himself at the quarries near 
Newark, N. J. These were various in characters, texture, 
and more particularly color. Red was the prevalent tint, 
but a yellow Sandstone had been found which, although not 
occurring in great quantity, was of interest as associated with 
it, but also more commonly in a contiguous grey Sandstone 
was found green Copper Carbonate and the yellow Sandstone 
was invariably thickly packed with vegetable remains in the 
form of stems of various sizes made up entirely of a brittle 
and often pulverulent, charcoal-like, Lignite. These speci- 
mens were offered as illustrating the discussion which had 
lately taken place at the meetings of the Lyceum relative to 
the genesis of these Sandstones and were collected for the 
purpose of making microscopical examinations of them; 
which he was now engaged upon. 
Pror. T. EGueston exhibited several crystals of Swedish 
Euxenite from his own collections, which were remarkable for 
size and beauty of termination. They shew the rectangular 
prism, 77, 72 with the vertical edges replaced by the rhombic 
prism J and a macrodome 1m 7. 
He also remarked that the Silver Ore from Thunder Bay, 
Lake Superior, is said to contain a large amount of Nickel. 
He was making the examination at the School of Mines to 
determine whether the Nickel is combined with the Silver or 
scattered through the ore and has not concluded his analyses 
so as to report in full. 
