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<p>[QUOTE=&quot;John Anthony, post: 2265406, member: 42773&quot;]It&#039;s difficult to sift out fact from allegory in ancient alchemical sources, but here&#039;s an example from <i>Phys. Myst. 13</i>...</p><p><br /></p><p>&quot;Threat the &quot;chrysokolla&quot; of the Macedonians, when coated with verdigris, triturating with urine of a heifer until it transmutes: for its nature is hidden within. If it transmutes, immerse it in castor oil, burning and dipping many times: then go and cook it with styptic earth, first titurating it with misy, or make it yellow with unfired sulfur and gild the whole golden mass.&quot;</p><p><br /></p><p>Anyone interested in these various techniques should read <i>Greco-Roman Alchemy and Coins of Imitation Silver</i>, by Paul T. Keyser, in AJN 7-8. Keyser is a chemist and does a yeoman&#039;s job of explaining the chemistry behind the ancient texts. It&#039;s still rather difficult to follow as a layman, however.[/QUOTE]</p><p><br /></p>

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