is preface to the ponderous 'Bibliotheca Chemica' (to which reference has already been made)?
1. Prepare a quantity of spirits of wine, so free from water as to be wholly combustible, and so volatile that a drop of it, if let fall, will evaporate before it reaches the ground. This constitutes the first menstruum.
2. Take pure mercury, revived in the usual manner from cinnabar; put it into a glass vessel with common salt and distilled vinegar; shake violently, and when the vinegar turns black, pour it off, and add fresh vinegar. Shake again, and continue these repeated shakings and additions until the mercury no longer turns the vinegar black; the mercury will then be quite pure and very brilliant.
3. Take of this mercury four parts; of sublimed mercury (mercurii meteoresati--probably corrosive sublimate), prepared with your own hands, eight parts; triturate them together in a wooden mortar with a wooden pestle, till all the grains of running mercury disappear. (This process is tr
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