What is "gallizing"

Gallize \Gal"lize\, v. t. [imp. & p. p. Gallized; p. pr. & vb. n. Gallizing.] [After Dr. L. Gall, a French chemist, who invented the process.] In wine making, to add water and sugar to (unfermented grape juice) so as to increase the quantity of wine produced. -- Gal`li*za"tion, n.