A needle gives almost no pain in entering the flesh anywhere ; and it may slip about and be pushed by the muscles in various directions, so as to come near of through the surface far from where it entered. If a needle should happen, in such wanderings, to reach the heart, it would no doubt so affect its movements as to cause death; but that is extremely unlikely to happen. Still, nobody Wishes to have even so small and smooth a thing slipping about in his body. If a needle, or part of a broken one, is known to enter the skin, a doctor had better be asked to try to get at it, if it has not already passed beyond being reached by a small incision. The same may be said of bits of broken glass. If not seen and removed when first getting in, they may remain a long time without much irritation or disturbance.