The oxide may be put in quantities of 500 or 600 lbs. weight into a large pot over the fire; pour a sufficient quantity of muriatic acid over the top, to act as a flux, and the action of the fire will melt the dross, when the pure metal be found at the bottom of the pot.

How To Restore Frozen Silver Solution

If it is the whitening solution, add 10 pennyweights of cyanide of potassium to a pint < the solntion. For the first, or hard coat solution, add about doubt the above quantity.