Essentials of Cookery : Heat for Cooking, Part 1

Library of Cookery
By Women's Institute of Domestic Arts and Sciences

(Page 8 of 16)

General Discussion

47. Inasmuch as heat is so important a factor in the cooking of foods, it is absolutely necessary that the person who is to prepare them be thoroughly familiar with the ways in which this heat is produced. The production of heat for cooking involves the use of fuels and stoves in which to burn them, as well as electricity, which serves the purpose of a fuel, and apparatus for using electricity. In order, therefore, that the best results may be obtained in cookery, these subjects are here taken up in detail.

48. Probably the first fuel to be used in the production of heat for cooking was wood, but later such fuels as peat, coal, charcoal, coke, and kerosene came into use. Of these fuels, coal, gas, and kerosene are used to the greatest extent in the United States. Wood, of course, is used considerably for kindling fires, and it serves as fuel in localities where it is abundant or less difficult to procure than other fuels. However, it is fast becoming too scarce and too expensive to burn. If it must be burned for cooking purposes, those who use it should remember that dry, hard wood gives off heat at a more even rate than soft wood, which is usually selected for kindling. Electricity is coming into favor for supplying heat for cooking, but only when it can be sold as cheaply as gas will its use in the home become general.

49. The selection of a stove to be used for cooking depends on the fuel that is to be used, and the fuel, in turn, depends on the locality in which a person lives. However, as the fuel that is the most convenient and easily obtained is usually the cheapest, it is the one to be selected, for the cost of the cooked dish may be greatly increased by the use of fuel that is too expensive. In cooking, every fuel should be made to do its maximum amount of work, because waste of fuel also adds materially to the cost of cooking and, besides, it often causes great inconvenience.

For example, cooking on a red-hot stove with a fire that, instead of being held in the oven and the lids, overheats the kitchen and burns out the stove not only wastes fuel and material, but also taxes the temper of the person who is doing the work. From what has just been said, it will readily be seen that a knowledge of fuels and apparatus for producing heat will assist materially in the economical production of food, provided, of course, it is applied to the best advantage.

Coal and Coke

50. Varieties of Coal. - Possibly the most common fuel used for cooking is coal. This fuel comes in two varieties, namely, anthracite, or hard coal, and bituminous, or soft coal. Their relative cost depends on the locality, the kind of stove, and an intelligent use of both stove and fuel. Hard coal costs much more in some places than soft coal, but it burns more slowly and evenly and gives off very little smoke. Soft coal heats more rapidly than hard coal, but it produces considerable smoke and makes a fire that does not last so long. Unless a stove is especially constructed for soft coal, it should not be used for this purpose, because the burning of soft coal will wear it out in a short time. The best plan is to use each variety of coal in a stove especially constructed for it, but if a housewife finds that she must at times do otherwise, she should realize that a different method of management and care of the stove is demanded.

51. Sizes of Coal. - As the effect of coal on the stove must be taken into consideration in the buying of fuel, so the different sizes of hard coal must be known before the right kind can be selected. The sizes known as stove and egg coal, which range from about 1-3/8 to 2-3/4 inches in diameter, are intended for a furnace and should not be used in the kitchen stove for cooking purposes. Some people who know how to use the size of coal known as pea, which is about 1/2 to 3/4 inch in diameter, like that kind, whereas others prefer the size called chestnut, which is about 3/4 inch to 1-3/8 inches in diameter. In reality, a mixture of these two, if properly used, makes the best and most easily regulated kitchen coal fire.

52. Quality of Coal. - In addition to knowing the names, prices, and uses of the different kinds of coal, the housewife should be able to distinguish poor coal from good coal. In fact, proper care should be exercised in all purchasing, for the person who understands the quality of the thing to be purchased will be more likely to get full value for the money paid than the one who does not. About coal, it should be understood that good hard coal has a glossy black color and a bright surface, whereas poor coal contains pieces.

The quality of coal can also be determined from the ash that remains after it is burned. Large chunks or great quantities of ash indicate a poor quality of coal, and fine, powdery ash a good quality. Of course, even if the coal is of the right kind, poor results are often brought about by the bad management of a fire, whether in a furnace or a stove. Large manufacturing companies, whose business depends considerably on the proper kind of fuel, buy coal by the heat units - that is, according to the quantity of heat it will give off - and at some future time this plan may have to be followed in the private home, unless some other fuel is provided in the meantime.

Mixed with poor coal are certain unburnable materials that melt and stick together as it burns and form what are known as clinkers. Clinkers are very troublesome because they often adhere to the stove grate or the lining of the firebox. They generally form during the burning of an extremely hot fire, but the usual temperature of a kitchen fire does not produce clinkers unless the coal is of a very poor quality. Mixing oyster shells with coal of this kind often helps to prevent their formation.

53. Coke. - Another fuel that is sometimes used for cooking is coke. Formerly, coke was a by-product in the manufacture of illuminating gas, but now it is manufactured from coal for use as a fuel. Because of the nature of its composition, coke produces a very hot fire and is therefore favorable for rapid cooking, such as broiling. However, it is used more extensively in hotels and institutions than in kitchens where cooking is done on a small scale.

Gas

54. Value of Gas as Fuel. - As a fuel for cooking purposes, gas, both artificial and natural, is very effective, and in localities where the piping of gas into homes is possible it is used extensively. Of the two kinds, artificial gas produces the least heat; also, it is the most expensive, usually costing two or three times as much as natural gas. Both are very cheap, however, considering their convenience as a kitchen fuel. Heat from gas is obtained by merely turning it on and igniting it, as with a lighted match.