The Boston cooking-school cook book

preparing food for the nourishment of the body. Prehistoric man may have lived on uncooked foods, but there are no savage races to-day who do not practise cookery in some way, however crude. Progress in civilization has been accompanied by progress in cookery. Much time has been given in the last few years to the study of foods, their necessary proportions, and manner of cooking them. Educators have been shown by scientists that this knowledge should be disseminated; as a result, “Cookery” is found in the curriculum of public schools of many of our towns and cities. Food is cooked to develop new flavors, to make it more palatable and digestible, and to destroy micro-organisms. For cooking there are three essentials (besides the material to be cooked),—heat, air, and moisture. =Heat= is molecular motion, and is produced by combustion. Heat used for cookery is obtained by the combustion of inflammable substances—wood, coal, charcoal, coke, gas, gasoline, kerosene, and alcohol—called fuels. Heat for cookery is applied by radiation, conduction, and convection. =Air= is composed of oxygen, nitrogen, and argon, and surrounds everything. Combustion cannot take place without it, the oxygen of the air being the only supporter of combustion. =Moisture=, in the form of water, either found in the food or added to it. The combined effect of heat and moisture swells and bursts starch-grains; hardens albumen in eggs, fish, and meat; softens fibrous portions of meat, and cellulose of vegetables. Among fuels, kerosene oil is the cheapest; gas gives the greatest amount of heat in the shortest time. _Soft wood_, like pine, on account of its coarse fibre, burns quickly; therefore makes the best kindling. _Hard wood_, like oak and ash, having the fibres closely packed, burns slowly, and is used in addition to pine wood for kindling coal. Where only wood is used as a fuel, it is principally hard wood. _Charcoal_ for fuel is produced by the smothered combustion of wood. It gives an intense, even heat, therefore makes a good broiling fire. Its use for kindling is not infrequent. There are two kinds of coal: _Anthracite_, or