Copperas

(n.) Green vitriol, or sulphate of iron; a green crystalline substance, of an astringent taste, used in making ink, in dyeing black, as a tonic in medicine, etc. It is made on a large scale by the oxidation of iron pyrites. Called also ferrous sulphate.

艾德蒙编辑

• Copperas, or Green Vitriol Sulphate of Iron. 威廉K.戴维. 智者、化学家和伟大医生的秘密.
• Among other lining materials found suitable were soapstone, alumina, ammonia, copperas, starch, Epsom salts, and gypsum, paper, pulp, and alum, and a mixture of various other materials. 威廉·亨利·杜利特. 世纪发明.
• Boil the logwood for 30 minutes in a gallon of water, and then add the copperas and lampblack. 威廉K.戴维. 智者、化学家和伟大医生的秘密.

校对:卢瑟