Argol

(n.) Crude tartar; an acidulous salt from which cream of tartar is prepared. It exists in the juice of grapes, and is deposited from wines on the sides of the casks.

手打:波莉

• The whitening is done by boiling the pins in a large copper kettle, which also contains layers of grained tin and a solution of argol or bitartrate of potash. 佚名. 神奇的知识之书.

录入:伦纳德