Sometimes silver is found in masses which are nearly pure; but this is very rarely the case. The largest quantities have been discovered in the copper mines of Lake Superior, and in some of the mines of Norway and Saxony. Some of these masses exceed five hundred pounds in weight, but ordinarily they weigh but a few ounces or pounds. Specimens of native silver are frequently found in the beds of rivers, very far from any other deposits of this metal. The richest mines of this metal, at the present day, are in the United States, particularly in Nevada and Utah. The great Comstock lode has already been referred to. In November, 1859, the discovery of silver mines at Lake Washoe became known, and in the following year the products of the mines were sent out in such large quantities as to lead many people to suppose that the commercial value of silver would be greatly cheapened. [Sidenote: SILVER MINES OF NEVADA.] Mines have been opened in various localities throughout Nevada, but the richest of them, and, in fact, almost the only ones, of any great value, are on the Comstock lode. Its ores are very rich. The vein is of unusual width, and it has made fortunes for a great many men, and, on the other hand, has taken fortunes from a great many others. Some of the most extensive mining speculations ever known in California have been in these mines. Their value has greatly fluctuated; in some years the product has exceeded twenty millions of dollars, and the price of shares in the mines increased accordingly; then the product would suddenly fall off, and down would go the stock. Sometimes dividends would be made every month, and suddenly they would be followed by left-handed dividends, or assessments. In San Francisco a single day has witnessed the reduction to beggary of men who at sunrise could boast of considerable wealth; the following day might witness their return to wealth, or the return of others to poverty. Nearly all the men who made money in Nevada a few years ago, and did not kill themselves by riotous living, are now poor, and have a brilliant prospect of remaining so. [Illustration: ONE METHOD OF WASHING FOR SILVER.] [Illustration: ANOTHER METHOD OF WASHING FOR SILVER.] VI. SILVER MINING IN NEVADA. HOW GOLD WAS DISCOVERED IN NEVADA.—A PECULIAR “BLACK SAND,” AND WHAT CAME OF IT.—SILVER CURSED AND THROWN AWAY.—ACCIDENTAL DISCOVERY OF THE VALUE OF THE ORE.—H. T. P. COMSTOCK.—THE COMSTOCK LODE.—HOW MINING RECORDS WERE KEPT.—YIELD OF THE NEVADA MINES.—BONANZA AND BORRASCA.—THE BIG BONANZA.—THE GRAVE OF THE FORESTS.—“WASHOE ZEPHYRS.”—PAY-ROLLS OF THE MINING COMPANIES.—INTERESTING DETAILS. Probably the most remarkable silver mines of the world are those of Nevada. It is difficult to estimate, with absolute accuracy, the amount which has been taken from them. They were only recently discovered, and the story of their discovery is quite romantic.