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 Dye
Hollandus 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 up with subtle combustible spirits, [Read more…] about Hollandus, De Lapide Philosophico. First Book 3-4
Hollandus, De Lapide Philosophico. First Book 2
Opera Mineralia, sive de Lapide Philosophico, by Johannes Isaac Hollandus, chapter two deals with actions involving silver cupeling. [Read more…] about Hollandus, De Lapide Philosophico. First Book 2
Hollandus, De Lapide Philosophico. First Book 1
Johannes Isaac Hollandus De Lapide Philosophico is composed of two treatises, but usually, only a summary of the second one is available on the web. [Read more…] about Hollandus, De Lapide Philosophico. First Book 1
Universal 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. [Read more…] about Universal Sal Armoniacum & Hollandus Sal Armeniacum