Follows/ how the sweetening-water can be usefully applied/ so that it does not go to waste.

Previously I have taught how those waters, through which the extracted ☉ gold is precipitated, are well to be used for further use and extraction of gold. For a ▽ water, in which ☽ silver or ♄ lead is dissolved, when it is poured into a ℞ aqua regia in which ☉ is dissolved, brings no change at all, but only the ☽ or ♄ that had been in the ▽ falls to the bottom and separates itself from the two waters, so that such can be used afterward again for an ℞ to pull ☉ from the ores with it.

However, since the precipitated ☽ or ♄, before one dries it, must be well sweetened several times over, therefore much sweetening-water is produced, which reasonably should be made useful again. Thus, I have deemed it necessary to describe this also, so that nothing is lacking for this glorious work, but everything might be taught completely.

Now, concerning these sweetening-waters, one should make the same, the greater part of which is only common ▽ and does not hold much 🜃 saltpeter, useful again. It is necessary that the useless ▽ be separated from the 🜃. Such separation, however, cannot be done because of