1662 Christian MENTZEL. Lapis Bononiensis in obscuro lucens, collatus cum phosphoro Hermetico Christiani Adolphi Balduini, cognomine Hermetis, &c. nuper edito, Et cunctis Naturę Indagatoribus Ulterioris scrutinii ergo exhibitus a C.M. 12° Bilefeldię: sumptibus Auctoris, typis Iusti Trenckeneri 1675 Ferguson British Library [Illustrations:- 1. Frontispiece engraving. 110x65mm. An ornate column supports two arches, which look out upon a landscape. Under the left the Sun shines in the sky upon a flat stone on the ledge of the arch, while under the rightmost a rectangular furnace blazes. 2. Inserted after p50. Engraving. 114x60mm. Two examples of stones, commented upon in the text. 3. Inserted after p58. Engraving. 111x59mm. Two examples of stones, commented upon in the text.]