MINERAL REPOSITORIES The following chara&ers of thefe depots or for mations were afcertained by Werner, after nu merous examinations of this diftridt during the courfe of thirty years *. He defcribes eight principal depots of metalli ferous veins, without including other lefs confider- able ones. Thefe depots are well diftinguilhed from, each other, and they generally contain many metals. ijt Depot.—Lead-glance Depot or Formation. The firft, and unqueftionably the oldeft, of thefe depots, is the one we are now about to defcribe. It has been known from the earlicft period of the working of the mines of Frey berg, and has afford ed uninterruptedly much lead and filver, and fmall quantities of copper ; and it flill continues to af ford the fame ores. Thefe ores are the following : Large and coarfe granular lead-glance, contain ing from an ounce and a half to two ounces and a half of lilver in the quintal. Common arfenic-pyrites. Large and coarfe granular black-blende. Common iron and liver pyrites, and fometimes alfo fmall portions of Copper-pyrites, and »:i. Sparry ironjlone. The * Thefe defcriptions are extraited from Werner’s Treatife on Veins.