414 TRANS. OF THE ACAD. OF SCIENCE. 
occurs in a thin nearly horizontal sheet, and is disseminated 
through coarse-grained dark sandstone of the age of the 2d. 
, previous to 1849, ‘by the former ‘pfopetetiies and 
iis | in the winter of 1849-50, and the fall of fem 
the present ele —— lead obtained i in 1 
36, R 
Copper, i inthe - of sulphuret, occurs sparingly wi wit 
lead at the Avon mines. re 
Tron Ore—A v ‘Iuable deposit of brown hematite o 
in T. 3t, R. 8, ie iL, on land belonging to the estate 
late Col. Kaufman. The ore occurs in the 2d. 
Limeetotey nd is to be seen in large masses, both on 
mit and the declivity of a high ridge. A number 
excavations have been made here, and at nearly all 
more or less i + remem ore was encountered. The surface 
tions w: ante seme that ore of good quality 
in Werkabla quan 
te a er depot of hematite exists in the same ; 
summit of a hill, a short 
part of the coun bias. ogee ie carbone de 
ici tacos 6 
nearly Ww and form a handsome ane @ 
time durable rock for for building. The principal 
the oe bese two miles west of Ste. Geneviev 
be had ther places in the neighborhood. 
ested oss oath , which is the same # : 
e ustom ouse at St. Louis, may 
Mississippi above Ste. Genevidve, and on 
a ‘The St. Louis, Ex 
‘S, 
