COFFEE is the seed of a small evergreen tree or shrub ranging from 15 to 25 feet in height. The branches are spreading or even pendant with opposite short petioled leaves, which are ovate, smooth, leathery, and dark green. The flowers are perfect, fragrant, occurring in groups of from three to seven in the axils of the leaves. The corolla is white, the calyx green and small. The ovary is green at first, changing to yellowish, and finally to deep red or purple at maturity. Each ovary has two seeds, the so-called coffee beans.

The coffee tree is a native of the tropical parts of Africa, in Abyssinia and the interior. The Arabians were among the first to transport it to their native country for the purposes of cultivation. From Arabia it was soon transplanted to other tropical countries.

The name coffee (Kaffee, Ger., CaffÉier, Fr.) was supposed to have been derived from the Arabian word Kahwah or Cahuah, which referred to the drink made from the coffee beans as well as to wines. It is now generally believed that the word was derived from Kaffa, a country of the Abyssinian highlands where the plant grows wild very abundantly.

From Kaffa the coffee plant found its way into Persia about the year 875, and still later into Turkey. According to popular belief, the drink coffee was the invention of the Sheik Omar in 1258. Others maintain that the drink was not known until even a later period. The mufti, Gemal Eddin of Aden, made a trip to Persia in 1500, where he learned the use of coffee as a drink, and introduced it into his own country for the special purpose of supplying it to the dervishes to make them more enduring in their prayers and supplications. In 1511 coffee had already become a popular drink in Mecca. About this time Chair Beg, the governor of Mecca, issued an edict proclaiming coffee-drinking injurious and making the use of coffee a crime against the laws of the Koran. It was prophesied that on the day of judgment the faces of coffee drinkers would be blacker than the pot in which the coffee was made. As a result of this crusade the coffee houses were closed; the coffee plantations were destroyed, and offenders were treated to the bastinade or a reversed ride on a donkey. The next governor of Mecca again opened the coffee houses, and in 1534 Sultan Soliman opened the first coffee houses in Constantinople, which were, however, again closed by Sultan Murad II., but not for long. In 1624 Venetian merchants brought large quantities of coffee into northern Italy. In 1632 there were 1,000 public coffee houses in Cairo. In 1645 coffee-drinking had already become very common in southern Italy. A Greek named Pasqua erected the first coffee house in London (1652). Coffee houses appeared in other cities in about the following order: Marseilles, 1671; Paris, 1672; Vienna, 1683; NÜrnberg and Regensburg, 1686; Hamburg, 1687; Stuttgart, 1712; Berlin, 1721. In 1674 the ladies of London petitioned the government to suppress the coffee houses. To discourage the use of coffee it was maintained that the drink was made from tar, soot, blood of Turks, old shoes, old boots, etc.

These coffee houses were of great significance, as may be gathered from the rapidity with which they spread and the general favor with which they were received. They were visited, not so much on account of the drink that was dispensed there, but rather for the purpose of discussing political situations; they constituted the favorite meeting-places for anarchists, revolutionaries, and high-class criminals. At times it even became necessary to close them entirely in order to check or suppress political intrigues or plottings against the government. At the present time the saloons take the place of coffee houses in most countries, and many of them are still the hotbeds of anarchy and crime. In Turkey, where alcoholic drinks are prohibited, coffee houses have full swing.

The Dutch again seemed to have been the first to attempt the cultivation of the coffee plant. In 1650 they succeeded in transplanting a few trees from Mecca to Batavia. From 1680 to 1690 the island already had large plantations; others were soon started in Ceylon, Surinam, and the Sunda islands. About 1713 Captain Desclieux carried some plants to the French possessions of the West Indies (Martinique). It is reported that only a single plant reached its destination alive, which is the ancestor of the coffee trees of the enormous plantations of the West Indies and South America.

The plant thrives best in a loamy soil in an average annual temperature of about 27 degrees C., with considerable moisture and shade. Most plantations are at an elevation of 1,000 feet to 2,500 above the sea-level. In order to insure larger yields and to make gathering easier the trees of the South American plantations are clipped so as to keep their height at about 6 feet to 6.5 feet. The yield begins with the third year and continues increasingly up to the twentieth year. The fruit matures at all seasons, and is gathered about three times each year. In Arabia, where the trees are usually not clipped, and hence comparatively large, the fruit is knocked off by means of sticks. In the West Indies and South America the red, not fully matured fruit is picked by hand. The outer hard shell (fruit coat, pericarp) is removed by pressure, rolling, and shaking. The beans are now ready for the market.

All of the different varieties or kinds of coffee found upon the market are from two species of Coffea; namely, C. Arabica and C. Liberica; the latter yielding the Liberian coffee, which is of excellent quality.

There are a number of so-called coffees which are used as substitutes for true coffee, of which the following are the more important. California coffee is the somewhat coffee-like fruit of Rhamnus Californica. Crust coffee is a drink resembling coffee in color, made from roasted bread crusts steeped in water. Mogdad or Negro coffee is the roasted seeds of Cassia occidentalis, which are used as a substitute for coffee, though they contain no caffeine. Swedish coffee is the seeds of Astragalus Boeticus used as coffee, for which purpose it is cultivated in parts of Germany and Hungary. Wild coffee is a name given to several plants native in India, as Faramea odoratissima, Eugenia disticha, and Casearia laetioides. Kentucky coffee is a large leguminous tree (Gymnocladus Canadensis) of which the seeds (coffee nut) are used as a substitute for coffee.

The coffee beans are roasted before they are in suitable condition for use. At first the green beans were used. According to one story, a shepherd noticed that some of his sheep ate the fruit of the coffee tree, and, as a result, became very frisky. Presuming that the coffee beans were the cause, he also ate of the beans and noted an exhilarating effect. The use of the roasted beans was said to have originated in Holland. Roasting should be done carefully in a closed vessel in order to retain as much of the aroma as possible. This process modifies the beans very much; they change from green or greenish to brown and dark brown and become brittle; they lose about 15 to 30 per cent. of their weight, at the same time increasing in size from 30 to 50 per cent. The aroma is almost wholly produced by the roasting process, but if continued too long or done at too high a temperature the aroma is again lost. The temperature should be uniform and the beans should be stirred continually. It should also be remembered that not all kinds or grades of coffee should be roasted alike. In order to develop the highest aroma, Mocha coffee should be roasted until it becomes a reddish yellow, and has lost 15 per cent of its weight. Martinique coffee should be roasted to a chestnut brown, with a loss of 20 percent in weight; Bourbon to a light bronze and a loss in weight of 18 percent.

The various coffee drinks prepared differ very widely in quality. This is dependent upon the varying methods employed in making them. The following method is highly recommended. It is advised to purchase a good quality of the unroasted beans and proceed as follows:

1. Sorting Berries.—Carefully remove bad berries, dirt, husks, stones, and other foreign matter usually present in larger or smaller quantities.

2. Roasting.—Roast as indicated above. Coat the hot beans with sugar to retain the aromatic principles; cool rapidly and keep in a dry place.

3. Grinding.—Grind fine just before the coffee is to be made.

4. Preparing the Coffee.—Coffee is usually made according to three methods; by infiltration, by infusion, and by boiling. Coffee by infiltration is made by allowing boiling water to percolate through the ground coffee. It is stated that much of the aroma is lost by this method. In the second process boiling water is poured upon the ground coffee and allowed to stand for some time. This gives a highly aromatic but comparatively weak coffee. In the third process the coffee is boiled for about five or ten minutes. This gives a strong coffee, but much of the aroma is lost. Since these methods do not give an ideal coffee an eminent authority recommends a fourth, as follows: For three small cups of coffee take one ounce of finely ground coffee. Place three-fourths of this in the pot of boiling water and boil for five or ten minutes; then throw in the remaining one-fourth and remove from the fire at once, stirring for one minute. The first portion of the coffee gives strength, the second the flavor. It is not advisable to filter the coffee as it is apt to modify the aroma. Allow it to stand until the grounds have settled.

Coffee is very frequently adulterated, especially ground coffee. It is stated that the beans have been adulterated with artificial beans made of starch or of clay. It is not uncommon to find pebbles which have been added to increase the weight. Most commonly the beans are not carefully hulled and sorted so that a considerable percentage of spoiled beans and hulls are present. The coffee plant seems to be quite susceptible to the attacks of various pests. The coffee blight is a microscopic fungus (Hemileia vastatrix) very common in Ceylon which has on several occasions almost entirely destroyed the coffee plantations. The coffee borer is the larva of a coleopter (Xylotrechus quadripes) which injures and destroys the trees by boring into the wood. The pest is most abundant in India, while another borer (Areocerus coffeÆ) is common in South Africa. Another destructive pest is the so-called coffee bug (Lecanium coffeÆ).

Ground coffee is adulterated with a great variety of substances. The roasted and ground roots of chicory (Cichorium intybus), carrot (Daucus carota), beet (Beta vulgaris), are very much used. The rush nut (Cyperus esculentus), and peanut are also used. A large number of seeds are used for adulterating purposes, as corn, barley, oats, wheat, rye, and other cereals; further, yellow flag, gray pea, milk vetch, astragalus, hibiscus, holly, Spanish broom, acorns, chestnuts, lupin, peas, haricots, horse bean, sun flower, seeds of gooseberry and grape. The seeds of Cassia occidentalis known as "wild coffee" are used as a substitute for coffee in Dominica and are said to have a flavor equal to that of true coffee. Sacca or Sultan coffee consists of the husks of the coffee berry, usually mixed with coffee and said to improve its flavor. In Sumatra an infusion is made of the coffee leaves or the young twigs and leaves. This is said to produce a refreshing drink having the taste and aroma of a mixture of coffee and tea. Efforts have been made, especially in England, to introduce leaf coffee with but little success.

As already stated, most of the many varieties of coffee upon the market are obtained from one species, and are usually classified according to the countries from which they are shipped. The following are the most important varieties:

1. African, or Ethiopian Coffee.
   1. Abyssinia.
   2. Galla.
   3. Kaffa.
2. Arabian, Levant, or Mocha Coffee.
   1. Bohuri.
   2. Sakki.
   3. Salabi.
3. Dutch Indian Coffee.
   1. Java.
   2. Batavia.
   3. Tscheribon.
   4. Samarang.
   5. Menado of the Celebes.
   6. Dadep of the Celebes.
   7. Sumatra.
4. American Indian Coffee.
   1. Manila.
   2. Cavita.
   3. Laguna.
   4. Batanges.
   5. Mindanao.
5. French Indian, or Bourbon Coffee.
6. English Indian Coffee.
   1. Nilgeri.
   2. Madras.
   3. Ceylon.
      1. Native.
      2. Plantation.
7. West Indian and Central American Coffee.
   1. Cuba (Havana, Santiago.)
   2. Jamaica.
   3. Santa Lucia.
   4. Trinidad.
   5. Domingo.
   6. Porto Rico.
   7. Martinique.
   8. Guadelupe.
   9. Dominica.
   10. Granada.
   11. Costa Rica.
   12. Guatemala, Nicaragua, Salvador.
8. South American Coffee.
   1. Surinam.
   2. Berbice, Demerara.
   3. Venezuela, La Guayra, Caracas.
   4. Puerto Cabello, or Coast Porto Rico.
   5. Brazil.

Coffee owes its stimulating properties to an alkaloid caffeine which occurs in the beans as well as in other parts of the plant. Caffeine also occurs in other plants; it is the active principle in Guarana and is perhaps identical with theine, the active principle of tea. It is generally believed that moderate coffee-drinking is beneficial rather than otherwise. It has ever been the favorite drink of those actively engaged in intellectual work. It has been tested and found satisfactory as a stimulant for soldiers on long or forced marches. Injurious effects are due to excessively strong coffee, or a long-continued use of coffee which has been standing for some time and which contains considerable tannin. Caffeine has been found very useful in hemicrania and various nervous affections. It has also been recommended in dropsy due to heart lesion. Strong, black coffee is very valuable in counteracting poisoning by opium and its derivatives. Coffee will also check vomiting. Strong coffee is apt to develop various nervous troubles, as palpitation of the heart, sleeplessness, indigestion, trembling. According to one authority, it is the aromatic principle of coffee which causes sleeplessness.