Digester, an instrument serving to dissolve solid animal sub-stances, in a manner similar to that performed by the stomach. This vessel was invented by Pap in : after putting meat into it, together with a sufficient quantity of water, a lid is closely screwed on, so as to admit no external air. By a moderate fire, the meat will, in the course of six or eight minutes, be reduced to a perfect pulp : by augmenting the heat of the fire, or extending the time of digestion, the hardest bones may be converted into a pulp or jelly. This effect, is produced by the most perfect closure of the vessel, which prevents the access or escape of air, so that the reverberations occasioned by the expansion of the aerial fluid, di solve the whole into an uniform, body, and mix the aqueous, saline, oleaginous, and other particles so strongly together, that they cannot be easily separated ; but, while hot, appear one liquor, and, when cold, form a jelly, of a strength proportionate to the quantity of flesh or bones dissolved in the water.

This useful instrument has not been hitherto applied to culinary purposes; though within the last two years an imperfect imitation of it has been vended in the shops ; and we state with satisfaction, that even the later is incomparably more economical than the various kinds of stew-pans formerly employed. Cast-iron digesters are now manufactured, of various sizes and prices. We understand that the most, complete articles of this description may be had of Messrs. JACKSON and MOSER, Dean-street, Soho ; or of Mr. Dowser, Fleet-street, London; both of whom have, we believe, obtained patents for their improvements in this valuable culinary utensil.