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Show Human Brain Is Heaviest. ' Except for the whale, the elephant and the porpoise, no living thing has a brain which weighs as much as the minimum of trie human's. In the entire human nervous system, according to the estimates of Professor Donaldson, there Is the astounding total of 11,200,-' ("'.0,000 nerve cells. In the study of these cells and their grouped relation to the five divisions of the brain as well as to the functions which they perform, several classes of scientific Investigators are engaged. |