218 
Pror, C. A. SrELy exhibited the Copper Hatchet-head, 
found near Auburn, Cayuga County, N. Y., belonging to Mr. 
Squier and mentioned by him at a late meeting. He had 
analyzed it and found it to consist of pure Copper with, pre- 
haps, the slightest trace of Silver, but no Tin or other metal. 
From this analysis and from other facts he considered it to be 
not of recent manufacture, and hammered, not cast as Mr. 
Squier had supposed by some of the early inhabitants of that 
part of the country. 
April 17th, 1871. 
THE PRESIDENT the Chair. Twenty-three persons present. 
Pror. D. S Martin exhibited a series of Sandstones from 
the Newark quarries containing the remains of vegetables in 
the form of Lignite. He described the position of the yellow 
and grey Sandstones which contain these remains relative to 
the red sandstone and shale. 
Pror. H. Wurtz enquired whether it had been decided if 
the organisms of which these were remains had grown where 
they are now found or had been transported there. 
The President, Dr. J. S. NEWBERRY, described the mode of 
formation of these sandstones and stated that they were the 
remains of ancient sea-shores upon which had drifted and 
collected the vegetable matter now preserved in the form of 
Lignite material. 
Pror. B. N. MARTIN exhibited a specimen of a Fossil Ammo- 
nite named Ammonites Swallow, from the cretaceous of Texas. 
Pror. H. Wurtz exhibited a specimen of Sand obtained 
some years since, from hills at that time being cut away, and 
