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The framework of the arm and hand consists of 30 bones: 1 for the upper arm, 2 for the forearm, 8 for the wrist, 5 for the palm of the hand, and 14 for the fingers and thumb. The hand and wrist are, strictly speaking, attached to only one of the two bones of the forearm. This may easily be proved. Let the right arm be loosely extended, and the hand made to-turn half round and back again without bending at the wrist, the fingers of the left hand during this motion touching lightly the

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