ated, have convinced us that farther explorations will reveal there also the existence of equally extensive accumulations of this important element of state wealth.
Other deposits of iron occur in the Tertiary strata in the mid dle division of the btate, but so tar as our observations have been carried, these ores are inferior to tnose found in the East. In the counties of Cnldweli and Guadalupe, examined by Dr. Riddell. are heavy deposits of iron ore, but tney contain such a large proportion ot siiex in the form of sand, as to render them generally unlit for profitable smelting. We have fair workable ores from Bastrop and Washington counties, but further research es are necessary, before we can give a positive opinion respecting their value.
Throughout the region of the Coal Measures in the northern part of the iSiate, we frequently tind bauds ot argillaceous iron ore interstratiiied with the gypseous shales, while the surface of the ground is ofteu thickly strewn with masses of hydra ted iron ore from the size of a tiibert to that of the double-list, in Young and Buchanan counties, these ores are often quite abundant in places, and they appear to be well adapted for smelting, although our investigations havw not been suiticiemly nnuute to enable us to determine whether they occur in suilicient quantity to be wrought with profit.
Lead. In the districts examined, no important deposits of lead have yet been found, but we nave received from different parts of the i^tate specimens ol galena or sulphuret of lead, which induce the belief that future researches will develop the existence of valuable veins of this metal. Thus we have samples of remark ably rich ore from the western part of the tState, near .fail i Juso, the Wichita Mountains and F ort ;San ttaba. In Liano County, occurs an interesting ore, the molybdate of lead, which is quite rare in mineralogical collections. (Specimens 01 it Iroin this re gion were presented t > the estate Cabinet by Dr. Moore of Bur net, who informs me that it is quite abundant. Copper. According to Dr. Geo. G IShuinard, small rounded
Specific gravity, 3,3245. Alumina, 1,0360, JSmcious matter insoluble in acids, 8,7IJ4I Per-oxide of iron, 71,78^0 Water l8,o«73 100,—
The specimen anatyzed represents a variety that is very common through out the iron region of this part of the State.