843. Quince Jam Purée.—Procure a sieve of fine ripe quinces, which peel and cut in four, taking out the cores, place them in a large preserving-pan and cover with cold water; set upon the fire, and when boiling and tender to the touch, place them in a large sieve to drain one hour, pass them through a tammy, then have ready a corresponding weight of sugar boiled to the sixth degree (No. 831) in the preserving-pan, to which add the purée of quinces, keep stirring over the fire till forming thin sheets, drop a little upon the cover of a stewpan, if it sets quickly take it from the fire, put it in small jars, and let remain a day until quite cold, when tie them down, and put by until wanted.