Note 108 — Chapter IV · THE ALCHEMICAL STUDIES OF SCOT

The Mappae Clavicula (Key to Painting) belongs to the tenth century; the Compositiones ad Tingenda is of the age of Charlemagne. A MS. of the eighth century (not the ninth as Berthelot says) is extant at Lucca (Bibl. Capit. Can. I. L.). Muratori has printed it in his Antiquitates Italicae, ii. 364-87. It contains receipts for the colours used in making tesserae for mosaic, for dyeing skins, cloth, bone, horn and wood; for making parchment; for various processes such as gold and silver beating and drawing, and the gilding of iron; for chrysography and the gilding of leather; ‘quomodo eramen in colore auri transmutetur,’ ‘operatio Cinnaberim,’ a perfume for the hands called lulakin, and for certain amalgams of gold and silver called glutina.