Place in a large stock-urn on a moderate fire a good heavy knuckle of a fine white veal with all the debris, or scraps of meat, including bones, remaining in the kitchen (but not of game); cover fully with cold water, adding a handful of salt; and as it comes to a boil, be very careful to skim all the scum off - no particle of scum should be left on - and then put in two large, sound, well-scraped carrots (whole), one whole, cleaned, sound turnip, one whole, peeled, large, sound onion, one well-cleaned parsley root, three thoroughly washed leeks, and a lew leaves of cleaned celery. Boil very slowly for six hours on the corner of the range; keenly skim the grease off; then strain well through a wet cloth into a china bowl or a stone jar, and put it away in a cool place for general use.