The Writings of Thomas Jefferson, Vol. 8 · Thomas Jefferson
QUERY VI.
_A notice of the mines and other subterraneous riches; its trees, plants, fruits, &c._ I knew a single instance of gold found in this State. It was interspersed in small specks through a lump of ore of about four pounds weight, which yielded seventeen pennyweights of gold, of extraordinary ductility. This ore was found on the north side of Rappahanoc, about four miles below the falls. I never heard of any other indication of gold in its neighborhood. On the Great Kanhaway, opposite to the mouth of Cripple creek, and about twenty-five miles from our southern boundary, in the county of Montgomery, are mines of lead. The metal is mixed, sometimes with earth, and sometimes with rock, which requires the force of gunpowder to open it; and is accompanied with a portion of silver too small to be worth separation under any process hitherto attempted there. The proportion yielded is from fifty to eighty pounds of pure metal from one hundred pounds of washed ore. The most common is that of sixty to one hundred pounds. The veins are sometimes most flattering, at others they disappear suddenly and totally. They enter the side of the hill and proceed horizontally. Two of them are wrought at present by the public, the best of which is one hundred yards under the hill. These would employ about fifty laborers to advantage. We have not, however, more than thirty generally, and these cultivate their own corn. They have produced sixty tons of lead in the year; but the general quantity is from twenty to twenty-five tons. The present furnace is a mile from the ore bank and on the opposite side of the river.
The ore is first wagoned to the river, a quarter of a mile, then laden on board of canoes and carried across the river, which is there about two hundred yards wide, and then again taken into wagons and carried to the furnace. This mode was originally adopted that they might avail themselves of a good situation on a creek for a pounding mill; but it would be easy to have the furnace and pounding mill on the same side of the river, which would yield water, without any dam, by a canal of about half a mile in length. From the furnace the lead is transported one hundred and thirty miles along a good road, leading through the peaks of Otter to Lynch's ferry, or Winston's on James' river, from whence it is carried by water about the same distance to Westham. This land carriage may be greatly shortened, by delivering the lead on James' river, above the Blue Ridge, from whence a ton weight has been brought on two canoes. The Great Kanhaway has considerable falls in the neighborhood of the mines. About seven miles below are three falls, of three or four feet perpendicular each; and three miles above is a rapid of three miles continuance, which has been compared in its descent to the great falls of James' river. Yet it is the opinion, that they may be laid open for useful navigation, so as to reduce very much the portage between the Kanhaway and James' river.
A valuable lead mine is said to have been lately discovered in Cumberland, below the mouth of Red river. The greatest, however, known in the western country, are on the Mississippi, extending from the mouth of Rock river one hundred and fifty miles upwards. These are not wrought, the lead used in that country being from the banks on the Spanish side of the Mississippi, opposite to Kaskaskia. A mine of copper was once opened in the county of Amherst, on the north side of James' river, and another in the opposite country, on the south side. However, either from bad management or the poverty of the veins, they were discontinued. We are told of a rich mine of native copper on the Ouabache, below the upper Wiaw.
The mines of iron worked at present are Callaway's, Ross's, and Ballendine's, on the south side of James' river; Old's on the north side, in Albemarle; Miller's in Augusta, and Zane's in Frederic. These two last are in the valley between the Blue Ridge and North mountain. Callaway's, Ross's, Miller's, and Zane's make about one hundred and fifty tons of bar iron each, in the year. Ross's makes also about sixteen hundred tons of pig iron annually; Ballendine's one thousand; Callaway's, Miller's, and Zane's, about six hundred each. Besides these, a forge of Mr. Hunter's, at Fredericksburg, makes about three hundred tons a year of bar iron, from pigs imported from Maryland; and Taylor's forge on Neapsco of Potomac, works in the same way, but to what extent I am not informed. The indications of iron in other places are numerous, and dispersed through all the middle country. The toughness of the cast iron of Ross's and Zane's furnaces is very remarkable. Pots and other utensils, cast thinner than usual, of this iron, may be safely thrown into, or out of the wagons in which they are transported. Salt-pans made of the same, and no longer wanted for that purpose, cannot be broken up, in order to be melted again, unless previously drilled in many parts. In the western country, we are told of iron mines between the Muskingum and Ohio; of others on Kentucky, between the Cumberland and Barren rivers, between Cumberland and Tennessee, on Reedy creek, near the Long Island, and on Chesnut creek, a branch of the Great Kanhaway, near where it crosses the Carolina line. What are called the iron banks, on the Mississippi, are believed, by a good judge, to have no iron in them. In general, from what is hitherto known of that country, it seems to want iron.
Considerable quantities of black lead are taken occasionally for use from Winterham in the county of Amelia. I am not able, however, to give a particular state of the mine. There is no work established at it; those who want, going and procuring it for themselves. The country on James' river, from fifteen to twenty miles above Richmond, and for several miles northward and southward, is replete with mineral coal of a very excellent quality. Being in the hands of many proprietors, pits have been opened, and, before the interruption of our commerce, were worked to an extent equal to the demand. In the western country coal is known to be in so many places, as to have induced an opinion, that the whole tract between the Laurel mountain, Mississippi, and Ohio, yields coal. It is also known in many places on the north side of the Ohio. The coal at Pittsburg is of very superior quality. A bed of it at that place has been a-fire since the year 1765. Another coal-hill on the Pike-run of Monongahela has been a-fire ten years; yet it has burnt away about twenty yards only. I have known one instance of an emerald found in this country. Amethysts have been frequent, and crystals common; yet not in such numbers any of them as to be worth seeking.
There is very good marble, and in very great abundance, on James' river, at the mouth of Rockfish. The samples I have seen, were some of them of a white as pure as one might expect to find on the surface of the earth; but most of them were variegated with red, blue, and purple. None of it has been ever worked. It forms a very large precipice, which hangs over a navigable part of the river. It is said there is marble at Kentucky. But one vein of limestone is known below the Blue Ridge. Its first appearance, in our country, is in Prince William, two miles below the Pignut ridge of mountains; thence it passes on nearly parallel with that, and crosses the Rivanna about five miles below it, where it is called the South-west ridge. It then crosses Hard-ware, above the mouth of Hudson's creek, James' river at the mouth of Rockfish, at the marble quarry before spoken of, probably runs up that river to where it appears again at Ross's iron-works, and so passes off south-westwardly by Flat Creek of Otter river. It is never more than one hundred yards wide. From the Blue Ridge westwardly, the whole country seems to be founded on a rock of limestone, besides infinite quantities on the surface, both loose and fixed. This is cut into beds, which range, as the mountains and sea-coast do, from south-west to north-east, the lamina of each bed declining from the horizon towards a parallelism with the axis of the earth. Being struck with this observation, I made, with a quadrant, a great number of trials on the angles of their declination, and found them to vary from 22° to 60°; but averaging all my trials, the result was within one-third of a degree of the elevation of the pole or latitude of the place, and much the greatest part of them taken separately were little different from that; by which it appears, that these lamina are, in the main, parallel with the axis of the earth. In some instances, indeed, I found them perpendicular, and even reclining the other way; but these were extremely rare, and always attended with signs of convulsion, or other circumstances of singularity, which admitted a possibility of removal from their original position. These trials were made between Madison's cave and the Potomac. We hear of limestone on the Mississippi and Ohio, and in all the mountainous country between the eastern and western waters, not on the mountains themselves, but occupying the valleys between them.
Near the eastern foot of the North mountain are immense bodies of _Schist_; containing impressions of shells in a variety of forms. I have received petrified shells of very different kinds from the first sources of Kentucky, which bear no resemblance to any I have ever seen on the tide-waters. It is said that shells are found in the Andes, in South America, fifteen thousand feet above the level of the ocean. This is considered by many, both of the learned and unlearned, as a proof of an universal deluge. To the many considerations opposing this opinion, the following may be added: The atmosphere, and all its contents, whether of water, air, or other matter, gravitate to the earth; that is to say, they have weight. Experience tells us, that the weight of all these together never exceeds that of a column of mercury of thirty-one inches height, which is equal to one of rain water of thirty-five feet high.
If the whole contents of the atmosphere, then, were water, instead of what they are, it would cover the globe but thirty-five feet deep; but as these waters, as they fell, would run into the seas, the superficial measure of which is to that of the dry parts of the globe, as two to one, the seas would be raised only fifty-two and a half feet above their present level, and of course would overflow the lands to that height only. In Virginia this would be a very small proportion even of the champaign country, the banks of our tide-waters being frequently, if not generally, of a greater height. Deluges beyond this extent, then, as for instance, to the North mountain or to Kentucky, seem out of the laws of nature. But within it they may have taken place to a greater or less degree, in proportion to the combination of natural causes which may be supposed to have produced them. History renders probably some instances of a partial deluge in the country lying round the Mediterranean sea. It has been often[3] supposed, and it is not unlikely, that that sea was once a lake.
While such, let us admit an extraordinary collection of the waters of the atmosphere from the other parts of the globe to have been discharged over that and the countries whose waters run into it. Or without supposing it a lake, admit such an extraordinary collection of the waters of the atmosphere, and an influx from the Atlantic ocean, forced by long-continued western winds. The lake, or that sea, may thus have been so raised as to overflow the low lands adjacent to it, as those of Egypt and Armenia, which, according to a tradition of the Egyptians and Hebrews, were overflowed about two thousand three hundred years before the Christian era; those of Attica, said to have been overflowed in the time of Ogyges, about five hundred years later; and those of Thessaly, in the time of Deucalion, still three hundred years posterior. But such deluges as these will not account for the shells found in the higher lands. A second opinion has been entertained, which is, that in times anterior to the records either of history or tradition, the bed of the ocean, the principal residence of the shelled tribe, has, by some great convulsion of nature, been heaved to the heights at which we now find shells and other marine animals.
The favorers of this opinion do well to suppose the great events on which it rests to have taken place beyond all the eras of history; for within these, certainly, none such are to be found; and we may venture to say farther, that no fact has taken place, either in our own days, or in the thousands of years recorded in history, which proves the existence of any natural agents, within or without the bowels of the earth, of force sufficient to heave, to the height of fifteen thousand feet, such masses as the Andes. The difference between the power necessary to produce such an effect, and that which shuffled together the different parts of Calabria in our days, is so immense, that from the existence of the latter, we are not authorized to infer that of the former.
M. de Voltaire has suggested a third solution of this difficulty. (Quest. Encycl. Coquilles.) He cites an instance in Touraine, where, in the space of eighty years, a particular spot of earth had been twice metamorphosed into soft stone, which had become hard when employed in building. In this stone shells of various kinds were produced, discoverable at first only with a microscope, but afterwards growing with the stone. From this fact, I suppose, he would have us infer, that, besides the usual process for generating shells by the elaboration of earth and water in animal vessels, nature may have provided an equivalent operation, by passing the same materials through the pores of calcareous earths and stones; as we see calcareous drop-stones generating every day, by the percolation of water through limestone, and new marble forming in the quarries from which the old has been taken out. And it might be asked, whether is it more difficult for nature to shoot the calcareous juice into the form of a shell, than other juices into the forms of crystals, plants, animals, according to the construction of the vessels through which they pass? There is a wonder somewhere. Is it greatest on this branch of the dilemma; on that which supposes the existence of a power, of which we have no evidence in any other case; or on the first, which requires us to believe the creation of a body of water and its subsequent annihilation? The establishment of the instance, cited by M. de Voltaire, of the growth of shells unattached to animal bodies, would have been that of his theory. But he has not established it. He has not even left it on ground so respectable as to have rendered it an object of inquiry to the _literati_ of his own country. Abandoning this fact, therefore, the three hypotheses are equally unsatisfactory; and we must be contented to acknowledge, that this great phenomenon is as yet unsolved. Ignorance is preferable to error; and he is less remote from the truth who believes nothing, than he who believes what is wrong.
There is great abundance (more especially when you approach the mountains) of stone, white, blue, brown, &c., fit for the chisel, good mill-stone, such also as stands the fire, and slate stone. We are told of flint, fit for gun-flints, on the Meherrin in Brunswick, on the Mississippi between the mouth of the Ohio and Kaskaskia, and on others of the western waters. Isinglass or mica is in several places; loadstone also; and an Asbestos of a ligneous texture, is sometimes to be met with. Marle abounds generally. A clay, of which, like the Sturbridge in England, bricks are made, which will resist long the violent action of fire, has been found on Tuckahoe creek of James' river, and no doubt will be found in other places. Chalk is said to be in Botetourt and Bedford. In the latter county is some earth believed to be gypseous. Ochres are found in various parts.
In the lime-stone country are many caves, the earthy floors of which are impregnated with nitre. On Rich creek, a branch of the Great Kanhaway, about sixty miles below the lead mines, is a very large one, about twenty yards wide, and entering a hill a quarter or half a mile. The vault is of rock, from nine to fifteen or twenty feet above the floor. A Mr. Lynch, who gives me this account, undertook to extract the nitre. Besides a coat of the salt which had formed on the vault and floor, he found the earth highly impregnated to the depth of seven feet in some places, and generally of three, every bushel yielding on an average three pounds of nitre. Mr. Lynch having made about ten hundred pounds of the salt from it, consigned it to some others, who have since made ten thousand pounds. They have done this by pursuing the cave into the hill, never trying a second time the earth they have once exhausted, to see how far or soon it receives another impregnation. At least fifty of these caves are worked on the Greenbriar. There are many of them known on Cumberland river.
The country westward of the Alleghany abounds with springs of common salt. The most remarkable we have heard of are at Bullet's-lick, the Big-bones, the Blue-licks, and on the north fork of Holston. The area of Bullet's-lick is of many acres. Digging the earth to the depth of three feet the water begins to boil up, and the deeper you go and the drier the weather, the stronger is the brine. A thousand gallons of water yield from a bushel to a bushel and a half of salt, which is about eighty pounds of water to one pound of salt. So that sea-water is more than three times as strong as that of these springs. A salt spring has been lately discovered at the Turkey foot on Yohogany, by which river it is overflowed, except at very low water. Its merit is not yet known. Dunning's lick is also as yet untried, but it is supposed to be the best on this side the Ohio. The salt springs on the margin of the Onondago lake are said to give a saline taste to the waters of the lake. There are several medicinal springs, some of which are indubitably efficacious, while others seem to owe their reputation as much to fancy and change of air and regimen, as to their real virtues. None of them having undergone a chemical analysis in skilful hands, nor been so far the subject of observations as to have produced a reduction into classes of the disorders which they relieve; it is in my power to give little more than an enumeration of them.
The most efficacious of these are two springs in Augusta near the first sources of James' river, where it is called Jackson's river. They rise near the foot of the ridge of mountains generally called the Warm spring mountains, but in the maps Jackson's mountains. The one distinguished by the name of the Warm spring, and the other of the Hot spring. The Warm spring issues with a very bold stream, sufficient to work a grist mill and to keep the waters of its basin, which is thirty feet in diameter, at the vital warmth, viz. 96° of Fahrenheit's thermometer. The matter with which these waters is allied is very volatile; its smell indicates it to be sulphureous, as also does the circumstance of its turning silver black. They relieve rheumatisms. Other complaints also of very different natures have been removed or lessened by them. It rains here four or five days in every week. The _Hot spring_ is about six miles from the Warm, is much smaller, and has been so hot as to have boiled an egg. Some believe its degree of heat to be lessened. It raises the mercury in Fahrenheit's thermometer to 112 degrees, which is fever heat. It sometimes relieves where the Warm fails. A fountain of common water, issuing within a few inches of its margin, gives it a singular appearance. Comparing the temperature of these with that of the Hot springs of Kamschatka, of which Krachininnikow gives an account, the difference is very great, the latter raising the mercury to 200° which is within 12° of boiling water. These springs are very much resorted to in spite of a total want of accommodation for the sick. Their waters are strongest in the hottest months, which occasions their being visited in July and August principally.
The Sweet springs are in the county of Botetourt, at the eastern foot of the Alleghany, about forty-two miles from the Warm springs. They are still less known. Having been found to relieve cases in which the others had been ineffectually tried, it is probable their composition is different. They are different also in their temperature, being as cold as common water; which is not mentioned, however, as a proof of a distinct impregnation. This is among the first sources of James' river. On Potomac river, in Berkley county, above the North mountain, are medicinal springs, much more frequented than those of Augusta. Their powers, however, are less, the waters weakly mineralized, and scarcely warm. They are more visited, because situated in a fertile, plentiful, and populous country, better provided with accommodations, always safe from the Indians, and nearest to the more populous States. In Louisa county, on the head waters of the South Ann branch of York river, are springs of some medicinal virtue. They are not much used however. There is a weak chalybeate at Richmond; and many others in various parts of the country, which are of too little worth, or too little note, to be enumerated after those before mentioned. We are told of a sulphur spring on Howard's creek of Greenbriar, and another at Boonsborough on Kentucky.
In the low grounds of the Great Kanhaway, seven miles above the mouth of Elk river, and sixty-seven above that of the Kanhaway itself, is a hole in the earth of the capacity of thirty or forty gallons, from which issues constantly a bituminous vapor, in so strong a current as to give to the sand about its orifice the motion which it has in a boiling spring. On presenting a lighted candle or torch within eighteen inches of the hole it flames up in a column of eighteen inches in diameter, and four or five feet height, which sometimes burns out within twenty minutes, and at other times has been known to continue three days, and then has been still left burning. The flame is unsteady, of the density of that of burning spirits, and smells like burning pit coal. Water sometimes collects in the basin, which is remarkably cold, and is kept in ebullition by the vapor issuing through it. If the vapor be fired in that state, the water soon becomes so warm that the hand cannot bear it, and evaporates wholly in a short time. This, with the circumjacent lands, is the property of His Excellency General Washington and of General Lewis. There is a similar one on Sandy river, the flame of which is a column of about twelve inches diameter, and three feet high. General Clarke, who informs me of it, kindled the vapor, staid about an hour, and left it burning.
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