TABLE I
STIMULANT AND TANNIC ACID PRESENT IN STIMULATING BEVERAGES
| Beverage | Stimulant | Quantity of Stimulant Grains | Quantity of Tannic Acid Grains |
| Coffee | Caffeine | 2 to 3 | 1 to 2 |
| Tea | Theine | 1 to 2 | 1 to 4 |
| Cocoa or chocolate | Theobromine | 1 to 1-1/2 | 1/2 to 1 |
15. The quantity of stimulant and tannic acid contained in an ordinary cup of tea, coffee, and cocoa or chocolate is given in Table I. As this table shows, the quantity, which is given in grains, does not vary considerably in the different beverages and is not present in such quantity as to be harmful, unless these beverages are indulged in to excess.
To reduce the quantity of caffeine contained in coffee has been the aim of many coffee producers. As a result, there are on the market a number of brands of coffee that have been put through a process that removes practically all the caffeine. The beverage made from coffee so treated is less harmful than that made from ordinary coffee, and so far as the flavor is concerned this loss of caffeine does not change it.
16. Neither tea nor coffee possesses any food value. Unless sugar or cream is added, these beverages contain nothing except water, flavor, stimulant, and tannic acid. Chocolate and cocoa, however, are rich in fat, and as they are usually made with milk and sugar they have the advantage of conveying food to the system. Because of their nature, tea and coffee should never be given to children. Cocoa and chocolate provide enough food value to warrant their use in the diet of young persons, but they should not be taken in too great quantity because of the large amount of fat they contain. Any of these beverages used in excessive amounts produces the same effect as a mild drug habit. Consequently, when a person feels that it is impossible to get along without tea or coffee, it is time to stop the use of that beverage.
COFFEE
HISTORY AND PRODUCTION OF COFFEE
17. COFFEE is the seed of the coffee tree, which in its wild state grows to a height of 20 feet, but in cultivation is kept down to about 10 or 12 feet for convenience in gathering the fruit. Coffee originated in Abyssinia, where it has been used as a beverage from time immemorial. At the beginning of the 15th century, it found its way into Arabia, where it was used by the religious leaders for preventing drowsiness, so that they could perform religious ceremonies at night. About 100 years later it came into favor in Turkey, but it was not until the middle of the 17th century that it was introduced into England. Its use gradually increased among common people after much controversy as to whether it was right to drink it or not. It is now extensively grown in India, Ceylon, Java, the West Indies, Central America, Mexico, and Brazil. The last-named country, Brazil, furnishes about 75 per cent. of the coffee used in the United States and about 60 per cent. of the world's supply.