291 Adam Michael BIRKHOLZ. Die sieben heiligen grundsaeulen der ewigkeit und zeit. In deutlichen sinnbildern, zum besten aller weisheit suchenden... Nebst dem Brunnen der weisheit und erkenntniss der Natur [Anonymus von Schwarzfuss]. Den Grundsätzen der wahren Alchemie. Vier merkwürdigen Briefen eines Adepten. Herausgegeben von AdaMah Booz. Leipzig: beh Paul Gotthelf Kummer 1783 Nat Union Cat [Illustrations:- 1. p39 Woodcut. Owl with spectacles between two candles and two flaming torches. (cf. Khunrath.) 2. p87 Woodcut. A square with triangles constructed on its four sides is set inside a circle. The four elements and the qualities are indicated. At the centre of the square is a circle in which one finds the quintessence. At the end of the book a large plate is inserted entitled "Liber Naturae Apertus". which has seven rows associated with the planets and 16 columns of correspondences, including the Holy Names of God, the Angelic Princes, Thrones, and Intelligences; the virtues; magical squares; colours; metals; precious stones; organs of the body; animals; plants.]