On Medicine (De Medicina), Vol. 2

This was used as an erodent, II. 8; or was fused with salt, sulphur or alum into a sulphate chloride and oxide of copper and used to make emollients and eye salves, II. 10, 194, 204, 210-14.

(4) Flos aeris or Chalcanthus; red oxide of copper.

This substance was like millet seeds and was produced by pouring cold water on molten copper and used as an exedent, II. 8, or as an agglutinant for wounds, II. 8, 10, 44.

(5) Squama aeris; black oxide of copper, copper scales.

These were chipped off molten copper, and when washed, pounded and dried acted as a mechanical aperient, I. 168.

(6) Chrysocolla; borate, carbonate and silicate of copper, gold solder.

This was used as an erodent and caustic, II. 8.

(7) Diphryges; sulphide and oxide of copper, mixed with iron and zinc ores.

This was used as an exedent and caustic and for cleaning ulcerations, II. 8, 50.

(8) Stomoma; red oxide of copper, copper scales hardened in the fire.

These were used to arrest haemorrhage and in making an eye salve, II. 4, 194.

(9) Psoricum; itch salve, consisted of chalcitis and cadmia (see below Cadmia) boiled together in vinegar to form hydrated oxides of copper and zinc, and then buried underground till used, II. 218, 220; the preparation was also applied to the eyelids, II. 220.