1417.1 Joel LANGELOTT [1677-1680]. Epistola ad pr�cellentissimos natur� curiosos. De quibusdam in chymia pr�termissis, quorum occasione secreta haud exigui momenti proque non-Entibus hactenus habita, candid� deterguntur & demonstrantur. 8� Hamburgi: G. Schultz; Amsterdam: J. Jansson a Waesberge 1672 Ferguson Wolfenbuttel British Library Wisconsin