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The blue ley being pumped clean off, set again the fire, and put into the boiler six or eight pails of water; and when thoroughly incorporated and boiled some time, try if the water runs from the soap: if it does, add water in small quantities at a time, until it is observed not to run, but, as formerly mentioned for yellow soap, to appear as just starting from the soap; in that case, after giving a good boil, and swelling the soap up in the pan to near the brim, draw away all the fire, and spread it about to die away. The pan is now finished, and may stand about twelve or fourteen hours; and if the quantity is large, that is, two, three, or four ton, double this time to stand will be much in favour of the soap, providing always that it can be kept very close and warm in the boiler. If any blueness still appear, repeat the washing.
Before casting, I would recommend the
