Association of American Geologists and Naturalists. 169 
Prof. W. B. Rogers mentioned that he had found the sulphuret 
of zinc sometimes, and the silicate-(electric calamine) generally 
and very abundantly in the lead mines of Wythe ‘Co., Virginia. 
The latter mineral often oceupies a great part of the breadth of the 
vein, lying for the most part beneath the lead ore, sometimes as a 
sub-crystalline mass and sometimes in groups of small radiating 
crystals. The sulphuret is chiefly met in nests and thin veins, 
in the sparry and maguesian limestone adjoining the lead ore, and 
is intermixed with crystals and small seams of galena. 
Prof. Rogers added, as a fact of mineralogical interest, that 
besides the sudphuret of lead, these mines yield in some instances 
quite a large proportion of carbonate, of which beautifully pure 
crystalline specimens are by no means uncommon; and what is 
still more interesting, they furnish a very considerable amount of 
red oxide or native miniwm, with a small proportion of yellow or- 
ide, both of which have hitherto been regarded’as very rare min- 
erals.. From its resemblance to ferruginous earth or clay, this red 
oxide was until lately regarded at the mines as worthless, but is 
now highly valued for its productiveness in metal. 
Dr. C. T. Jackson exhibited a specimen of meteoric iron from 
Claiborne County, Alabama, in which he discovered chlorine 
in the form of chloride of iron and nickel, in 1834. (See this 
Journal, Vol. xxxt¥,{px332,}2% = sot eee 
Prof. J. B. Rogers referred to some analyses of meteoric iron 
and meteorites recently made by him. A specimen of meteoric 
iron taken from a mass of many pounds weight in Grayson Co. 
Virginia, was found to contain 6.15 per cent. of nickel, and gave 
a very slight trace of chlorine. A meteoric stone from Georgia, 
made up of shot-like grains of nickeliferous iron with slender 
flattened threads of the same mineral imbedded in a paste com- 
posed chiefly of silicate of magnesia and alumina, gave = indi- 
cations of chlorine. ‘The grains yielded 7 per cent. of nickel. 
Prof. W. B. Rogers stated that he had examined a mass of 
meteoric iron from Roanoke County, Virginia, and was unable to 
detect in it the slightest trace of chlorine. A fragment of mete- 
orice stone from Ashe County, North Carolina, examined at the 
same time, was found to contain a marked quantity of this prin- 
ciple, the presence of which, however, was accounted for by the 
fragment having been in contact with a bag of salt, as it was car- 
ried home by the person who found it. 
Vol. xu, No. 1.—April-June, 1842. 2 
