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are composed of sugar of various kinds, chocolate, nuts, fruits, colorings, and flavorings. Each of these has its own particular value as appealing to the sense of sight, the sense of taste, or the need of the body for nourishment.

Sugar (C12H22O11) is a crystalline substance known by its sweet taste and its solubility in water. Sugar undergoes little change during digestion; as glucose it is carried by the blood through the body, and unites with oxygen breathed in from the air, forming carbon-dioxide (CO2), gas, and water, in which forms it leaves the body. During this change, energy is produced, and used for muscular work. Sugar is