158 Johann Conrad BARCHUSEN. Pyrosophia, succincte atque breviter iatro-chemiam, rem metallicam et chrysopoeiam pervestigans. Opus medicis, physicis, chemicis, pharmacopoeis, metallicis &c. non inutile. 4° Lugduni Batavorum: impensis C. Boutestein 1698 Ferguson Young Nat Union Cat Bibliotheque Nationale [Illustrations:- 1. Inserted before p62. Engraving 162x251mm. Entitled "Facies interna laboratorii Academii Traiectini". A man sits at a table holding a set of scales. around him are various pieces of chemical apparatus, with furnaces built into the walls. The text on page 63 describes the different articles in the laboratory. 2. Inserted before p67. Engraving 183x139mm. 28 pictures of chemical apparatus, described in the text opposite. 3. Inserted after p68. Engraving 182x140mm. Depictions of some furnaces and distillation apparatus, described in text opposite. 4. Inserted after p386. Engraving 184x139mm. Depictions of mining and ore extraction furnaces, described in text opposite. 5. Inserted before p387. Engraving 184x138mm. Depictions of various furnaces, with descriptions in text opposite.]