1) Crude tartar 2) Tartar 3) Tartar in its natural form 4) Wine cask deposit 
Argol may mean one of the following: `Argol` is also found used as follows: ...
crust formed on wine kept too long or improperlydried cow dung used as fuel
• (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.
Ar'gol noun [ Confer Argal , Orgal . Of unknown origin.] 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. Ure. 
a crude tartar, produced as a by-product in casks by the fermentation of wine grapes, used as a mordant in dyeing, in the manufacture of tartaric acid, and in fertilizers.