This striking hint on the part of nature, that alcoholic beverages are unnecessary, is fully confirmed by the overwhelming majority of hundreds of tests which have been made in the laboratory, showing clearly that, while these beverages may give off trifling amounts of energy in the body, their real effects and the sole reason for their use are their stimulating, or their discomfort-deadening (_narcotic_) effect. And the more carefully we study them, the heavier we find the price that has to be paid for any temporary relief or enjoyment which they may seem to give. Tea, Coffee, and Cocoa. The "weakest" and most commonly used of these beverages or amusement foods, are tea, coffee, and cocoa. These have an agreeable taste, mildly stimulate the nervous system, and, when used in moderation by adults, seldom do much harm. To a small percentage of individuals, who are specially sensitive to their effects, they seem to act as mild poison-foods, much in the same way as strawberries, cheese, or lobsters do to others. Tea is made from the green leaves of a shrub growing in hilly districts in China, Japan, and Southern India. The finer and more delicately flavored brands are from the young leaves, shoots, and flowers of the plant; while the coarser and cheaper are from the old leaves, stalks, and even twigs--the latter containing the most _tannin_, which, as we shall see, is the most injurious element in tea. Coffee is made from the seeds of a cherry-like berry growing upon a shrub, or low tree, on tropical hillsides. The bulk of our supply comes from South America, and is known as "Rio" coffee, from Rio Janeiro, the port in Brazil from which most of it is shipped. That from the East Indies is known as Java, and that from Arabia as Mocha; though these last two are now but little more than trade-names for certain finer varieties of coffee, no matter where grown. Cocoa and chocolate are made from the bean-like seeds of a small tree growing in the tropics and, in cake, or solid, form, contain considerable amounts of fat, and usually sugar and vanilla, which have been added to them to improve their flavor. As, however, only a teaspoonful or so of the powdered cocoa, or chocolate, goes to make a cupful, the actual food value of cocoa or chocolate, unless made with milk, is not much greater than that of tea or coffee with cream and sugar. They contain less _caffein_ than either tea or coffee, but are liable to clog rather than to increase the appetite for other foods.