60 A list of Minerals and Organic Remains. 
imperfect prisms. The composition of this mineral, ac- 
cording to authors, is variable, and a small portion of 
alumine and manganese, as well as silex, lime and iron, are 
found in it. In the mineral from Chatham, is a little 
alumine and manganese, and it appears to contain less lime,. 
and more silex and iron than the European specimens. 
To the eye it resembles hornblende. But its specific grav- 
ity and composition seem to prove it to be yenite. 
Sulphate of Magnesia, 
Effloresces on clay in the bank of the Hudson, three 
miles above the village of Lansingburgh. Eaton. It is said 
to be found also in the argillaceous marl about the Hud- 
son. 
Galena. 
Livingston, Columbia county, N. Y. ‘The mine I have 
not visited; but the ore is said to be very abundant. « 
Nephrite. 
Salisbury, Con. found by Mr. C. A. Lee. It is somewhat 
lamellar, and exhibits imperfect prisms by fracture, and is 
less bluish white than that of Rhode-Island. Its hardness, 
toughness and fusion, prove it to be the same mineral. 
Calcareous Tufa. 
4 
At the Falls in Canaan, Con. It is finely characterised, 
but is more compact and hard than it commonly is. Found 
by Mr. Lee. 
Art. I}.—A est of Minerals and organic Remains, occur- 
ring in the Canadas. By Joun Biessy, M. D.F. L. S. 
and M. G. S. Lond. 
TO PROFESSOR SILLIMAN, 
Sir, 
I respectfully solicit a place in the American Journal of 
Science for a list of minerals and organic remains occur- 
