After a time, through continued indulgence, the digestive organs become weakened, and the food taken does not satisfy the appetite. Unhealthy conditions are established, and there is a craving for more stimulating food. Tea, coffee, and flesh meats produce an immediate effect. Under the influence of these poisons the nervous system is excited, and, in some cases, for the time being, the intellect seems to be invigorated and the imagination to be more vivid. Because these stimulants produce for the time being such agreeable results, many conclude that they really need them and continue their use....