Germany's Prosperity

the sharpness of the ▽ in metallic vessels; it would otherwise attack them, and in time dissolve them. And in glasses, to separate the useless ▽ from the sharp Spiritibus spirits would require far too much time and fire. Therefore, a better modus method must necessarily be used to make them good, for which I have found none better than this, namely:
Make for yourself a vault of lime, ashes, and short horse-manure, just as I taught to do above for the saltpeter. Make a fire underneath so that it becomes dry. When it is then completely dry, one can pour the aforementioned sweetening ▽ water onto it, yet gradually little by little, so that no water runs beside the vault, and no more be poured on it than the vault can draw into itself and become wet through and through from it. When it then becomes dry again through the fire, one should again pour some of the sweetening-water onto it and make it moist. Such pouring on and drying out should happen as often and as many times until the vault is finally full and will draw no more into itself. When this has happened, one has nothing further to do than to break up the aforementioned vault, grind it, and draw the Salpeter saltpeter out of it through common ▽, boil it down, and let it shoot into saltpeter. It will give a right good and fine saltpeter, better than that drawn from stables. This, however,