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exist in some part of the human economy, and are taken into the stomach hidden in our various articles of food. This would seem enough for Nature's requirements. It is enough for all the brute creation. As men, and as thinkers, we need something more. In all the lower orders of creation the normal state is preserved. Health is the rule, and sickness the rare exception. Demand and supply are exactly balanced. The contraction of the voluntary muscles, and the expenditure of nervous power consequent on locomotion, the temperate use of the five senses, and the quiet, regular performance of the great organic processes, limit the life and the waste of the creature. But when the brain expands in the dome-like cranium of the human being, a new and incessant call is made on the reparative forces. The nervous system has its demands increased a hundred-fold. We think, and we exhaust; we scheme, imagine, study, worry, and enjoy, and proportionately we waste. In the rude and primitive nations this holds good much less than among civilized people. Yet even among them, the faculties whose possession involves this loss have been ever exercised to repair it by artificial means. In the busy life of to-day how much more is this the case! Overworked brains and stomachs, underworked muscles and limbs, soon derange the balance of supply and demand. We waste faster than enfeebled digestion can well repair. We feel always a little depressed; we restore the equilibrium temporarily by stimulation,--some with alcohol and tobacco, others with coffee and tea. Now it is to these last means of supply that the name has been given of "accessory foods." "Accessories are those by whose use the moulting and renewing (that is, the metamorphosis) of the organic structures are modified, so as best to accommodate themselves to required circumstances. They may be subdivided into those which _arrest_ and those which _increase_ metamorphosis." It is under the former class that are placed alcohol, sugar, coffee, and tea. Again, says Dr. Chambers,--"Not satisfied with the bare necessaries," (the common varieties of plastic and calorifacient food,) "we find that our species chiefly are inclined by a _soi-disant_ instinct to feed on a variety of articles the use of which cannot be explained as above; they cannot be found in the organism; they cannot, apparently, without complete disorganization, be employed to build up the body. These may be considered as extr
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