Page:The Boston cooking-school cook book (1910).djvu/62

 an astringent. Coffee is more stimulating than tea, although, weight for weight, tea contains about twice as much theine as coffee contains caffeine. The smaller proportion of tea used accounts for the difference. A cup of coffee with breakfast, and a cup of tea with supper, serve as a mild stimulant for an adult, and form a valuable food adjunct, but should never be found in the dietary of a child or dyspeptic. Coffee taken in moderation quickens action of the heart, acts directly upon the nervous system, and assists gastric digestion. Fatigue of body and mind are much lessened by moderate use of coffee; severe exposure to cold can be better endured by the coffee drinker. In times of war, coffee has proved more valuable than alcoholic stimulants to keep up the enduring power of soldiers. Coffee acts as an antidote for opium and alcoholic poisoning. Tea and coffee are much more readily absorbed when taken on an empty stomach; therefore this should be avoided except when used for medicinal purposes. Coffee must be taken in moderation; its excessive use means palpitation of the heart, tremor, insomnia, and nervous prostration.

Coffee is often adulterated with chiccory, beans, peas, and various cereals, which are colored, roasted, and ground. By many, a small amount of chiccory is considered an improvement, owing to the bitter principle and volatile oil which it contains. Chiccory is void of caffeine. The addition of chiccory may be detected by adding cold water to supposed coffee; if chiccory is present, the liquid will be quickly discolored, and chiccory will sink; pure coffee will float.

Buying of Coffee. Coffee should be bought for family use in small quantities, freshly roasted and ground; or, if one has a coffee-mill, it may be ground at home as needed. After being ground, unless kept air tight, it quickly deteriorates. If not bought in air-tight cans, with tight-fitting cover, or glass jar, it should be emptied into canister as soon as brought from grocer's.

Coffee may be served as filtered coffee, infusion of coffee, or decoction of coffee. Commonly speaking, boiled coffee is