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high as eight per cent. having been lately reported from 
there. 
He also exhibited specimens of Black Band Iron Ore from 
Pottsville, where it occurs in large quantities. 
Dr. J. S. Newserry, remarked that in Ohio beds of the 
Black Band Iron Ore, have been found of at least sixteen 
feet thick, but these are not common, thinner beds are fre- 
quently worked, and very advantageously, as this ore is an 
easy one to smelt, and at the same time, one which, as a 
general rule, yields a very superior quality of metal. 
Pror. O. W. Morris, presented specimens of Fossils from 
Webster Tunnel, Colesville, Broome County, N. Y. These are 
much weathered, but can be distinguished as coming from 
the sandstones of the Chemung group. 
Pror. D. 8. Martin, exhibited specimens of Cassiterite 
from San Jacinto, San Bernadino County, California, and of the 
Tin smelted from the ore. The metal on analysis, is shown 
to consist of Tin 99°78. Iron 0-11. Copper 0-11. The ore 
is reported to yield 13°37 per cent. of metal. It is being 
worked very extensively and successfully. 
He also exhibited a fine specimen of crystallized Cinnabar 
from Napa County, California. The crystals were of remarka- 
ble perfection of form and good size. 
He also exhibited a specimen of Copper Glance, replacing 
woody-fibre from the three forks of the Little Washita River, 
Archer County, Texas. This was a remarkable specimen, 
inasmuch as the texture of the wood was very perfectly re- 
tained, whilst its original constituents had been entirely re- 
placed by the copper compound. On analysis it was found 
to contain 55:44 per cent. of Copper, with a little Malachite 
and Carbonaceous matter. 
Dr. NEWBERRY remarked that specimens of this kind, in 
which the woody tissue has been replaced by Copper com- 
pounds, are extremely common all over that section of 
country from which this was obtained. They are from the 
