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Show NERVES THAT TIRE EAS4LY' Sense of Smell One That Is Quickly Fatigued Heat Nerves Practically Practi-cally Never at Rest. The most easily tired nerves In the body are the nerves of smell. As you pass a rose In the garden the quantity quan-tity of perfume that gets Intoyour nostril must be many millions of billion bil-lion of times smaller than the tiniest grain of sand. But rub the strongest perfume on your upper Hp, and in a few seconds you fall to notice it, the nerve of smell Is so quickly fatigued. The heat nerves and cold nerves, which are quite distinct from the nerves of ordinary sensation, also give over working very quickly. A bath , that seems quite hot when you get into It very soon ceases to cause any particular par-ticular feeling of heat. Nerves of hearing and sight can go tfyough an enormous amount of work. For sixteen hours a day they Vork hard, and are still willing to do more. The nerves of the heart are the most untiring of all. From the first dawn of life until the last gasp they work without stopp'ni for one Instant |