How a volatile urine salt can extract our White and Red Dye from minerals. By a not-perfect alchemist often mistrusted because of his candor: J. I. Hollandus.
[Read more…] about Hollandus, How Urine Salts Extract a White and Red DyeHollandus Johannes Isaac
Hollandus, De Lapide Philosophico. First Book 3-4
Instead of distillations on liquids and oils extracted from plants, in chap three, Johannes Isaac Hollandus has salts ground, dissolved in distilled vinegar, then raised with subtle combustible spirits,
[Read more…] about Hollandus, De Lapide Philosophico. First Book 3-4Hollandus, De Lapide Philosophico. First Book 2
Chapter Two of Opera Mineralia, sive de Lapide Philosophico, by Johannes Isaac Hollandus, deals with actions involving silver cupeling.
[Read more…] about Hollandus, De Lapide Philosophico. First Book 2Hollandus, De Lapide Philosophico. First Book 1
Johannes Isaac Hollandus De Lapide Philosophico comprises two treatises, but only a summary of the second one is usually available online.
[Read more…] about Hollandus, De Lapide Philosophico. First Book 1Universal Sal Armoniacum & Hollandus Sal Armeniacum
Johannes Isaac Hollandus, in his neglected Opera Vegetabilia, gives a real clue as far as is concerned Sal Armoniacum or Universal Solvent or Mercurius.
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