384 Miscellanies. 
The above quantity of carbonate corresponds to 39.1 per cent. of 
protoxide or 30.45 per cent. of pure metallic iron, which is 3.35 per 
cent. below the above yield in pig metal, or it is 9.9 percent. of the 
pig metal itself, to be regarded as pure iron matter; which is proba- 
bly very near the true average amount according to the latest and best 
analyses. The yield in iron is equal to the average of Scotch ores in 
the neighborhood of Glasgow. 
The second: variety of the ore examined, was a sample festa the 
same locality, but from a different part of the bed from thatin which 
the preceding was found. Sp. grav. 2.896. Assayed in the dry way 
Water, : P P i 4 : 8342 
Pig metal, , ‘ ‘ ‘ > ‘ 44.96 
Earthy matter, ‘ . . ‘ = 24.804 
Oxygen, . ‘ 4 17.11 
The ore seemed to have suffered a diodes by atmospheric influen- 
ces, from the condition of a carbonate of the protoxide of iron, to 
that of a hydrate of the peroxide; in which process some of the 
earthy ingredients may have washed away. Analyzed in the humid 
way, it gave— . . 
Water, ; 13,12 
Peroxide of iron, tg a trace of iaiialaan, * 63.65 
Silica, : 3 7 : r : , : “ae 
Alumina, . ‘ : P ; " ; 8.77 
Magnesia, . —— By ese 1.01 
100.00 
The quantity of peroxide of iron corresponds to 44.55 per cent. of 
iron, or .41 per cent. less than that of the metal actually obtained. 
Hence it appears that the quantity of iron remaining in the cinder, is 
very nearly equal to that of the carbon, &c., in the pig metal 
‘Near the second bed of coal opened on the slope of wis wil north 
of the northern branch of Beaver Creek, Prof. J. found some ore 
thrown out in excavating a coal shaft. It is of a brown, or yellowish 
brown color, compact, with small shining particles. Sp. grav. 3.555- 
Ata temp. of 330° it loses in moisture, . 0.550 
By strong calcination, it loses of water, . 10.048 
It contains of peroxide of iron, S , ha 
Sis earthy impurities, . . 13.382 
7 ‘ 100. 
The quantity of pig metal obtained in Prof. Jol ’s analysis was 
per cent.; its color dark gray; structure crystalline, granular. 
