During eighteen months of the same period, from Dec. 31st, 1816, to June 1st, 1818, there was deposited with, and shipped by, sundry other persons in Herculaneum, as ascertained by Colonel S. Hammond and M. Austin, Esq., 517,495 pounds of lead, together with patent shot, manufactured by Elias Bates and Christian Wilt, to the amount of 668,350 pounds. For the remaining part of the estimated term, (two years and eleven months,) it is reasonable to presume that a like quantity of lead was exported through private channels at Herculaneum, and a like quantity of shot manufactured by Messrs. Bates and Wilt. This will make the quantity of pig and bar lead shipped by individuals, 1,034,990 pounds, and the quantity of patent shot manufactured, 1,356,700 pounds; which two sums, added to the receipts of Mr. Bates's warehouse, as detailed above, gives us an aggregate amount of 4,757,990 pounds, for the period of two years and eleven months. St. Genevieve, as has already been mentioned, is probably the storehouse for one-half of the mines, and may therefore be estimated to have received and exported the same quantity of pig and bar lead during the same period, making a total of 9,515,512 pounds, which gives an average product of more than three million of pounds of lead per annum.
It would be interesting to know in what proportion the different mines have contributed to this amount. The above details show us their collective importance; but we should then be enabled to estimate their individual and comparative value. With this view, I have compiled, from the best information, the following:
In this estimate are included all persons concerned in the operations of mining, and who draw their support from it; wood-cutters, teamsters, and blacksmiths, as well as those engaged in digging and smelting lead-ore, &c. The estimate is supposed to embrace a period of three years, ending 1st June, 1819, and making an average product of 3,726,666 lbs. per annum, which is so near the result arrived at in the preceding details, as to induce a conclusion that it is essentially correct, and that the mines of Missouri, taken collectively, yield this amount of pig-lead annually.
The United States acquired possession of the mines in the year 1803, fifteen years ago last December; and, assuming the fact that they have annually produced this quantity, there has been smelted, under the American government, fifty-five million pounds of lead.
On the view which has now been taken of the Missouri mines, it may be proper here to remark—
1. That the ores of these mines are of the richest and purest kind, and that they exist in such bodies as not only to supply all lead for domestic consumption, but also, if the purposes of trade require it, are capable of supplying large quantities for exportation.
2. That although at different periods the amount of lead manufactured has been considerable, yet this produce has been subject to perpetual variation, and, upon the whole, has fallen, in the aggregate, far short of the amount the mines are capable of producing. To make these mines produce the greatest possible quantity of lead of which they are capable, with the least possible expense, is a consideration of the first political consequence, to which end it is desirable that the reserved mines be disposed of, to individuals, or that the term for which leases are granted be extended from three to fifteen years, which will induce capitalists, who are now deterred by the illiberality of governmental terms, to embark in mining. That there be laid a governmental duty of two and a half cents per pound on all imported pig and bar lead, which will exclude foreign lead from our markets, and afford a desired relief to the domestic manufacturer. The present duty is one cent per pound. But this does not prevent a foreign competition; and the smelters call for, and appear to be entitled to, further protection.
3. That although the processes of mining now pursued are superior to what they were under the Spanish government, yet there is a very manifest want of skill, system, and economy, in the raising of ores, and the smelting of lead. The furnaces in use are liable to several objections. They are defective in the plan, they are constructed of improper materials, and the workmanship is of the rudest kind. Hence, not near the quantity of metallic lead is extracted from the ore which it is capable, without an increase of expense, of yielding. There is a great waste created by smelting ore in the common log furnace, in which a considerable part of the lead is volatilized, forming the sublimated matter which adheres in such bodies to the sides of the log furnaces, and is thrown by as useless. This can be prevented by an improvement in its construction. To pursue mining with profit, it is necessary to pursue it with economy; and true economy is, to build the best of furnaces, with the best of materials. At present the furnaces are constructed of common limestone, which soon burns into quicklime, and the work requires rebuilding from the foundation. Not only so, but the frequency with which they require to be renewed, begets a carelessness in those who build them, and the work is accordingly put up in the most ordinary and unworkmanlike manner. Instead of limestone, the furnaces ought to be constructed of good refractory sandstone, or apyrous clay, in the form of bricks, which will resist the action of heat for a great length of time. Both these substances are the production of that country, and specimens of them are now in my possession.
4. From the information afforded, it has been seen that the mines are situated in a country which affords a considerable proportion of the richest farming-lands, producing corn, rye, wheat, tobacco, hemp, flax, oats, &c., in the greatest abundance, and that no country is better adapted for raising cattle, horses, hogs, and sheep. The country is well watered, and with the purest of water; the climate is mild and pleasant, the air dry and serene, and the region is healthy in an unusual degree. Every facility is also afforded by its streams for erecting works for the manufacture of white and red lead, massicot, litharge, shot, sheet-lead, mineral yellow, and the other manufactures dependent upon lead. The country also abounds with various useful minerals besides lead, which are calculated to increase its wealth and importance. It is particularly abundant in iron, zinc, manganese, sulphur, salt, coal, chalk, and ochre.