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In a previous work I have considered the organization of the American aborigines in gentes, phratries, and tribes, with the functions of each in their social system. The gentile organization opens to us one of the oldest and most widely-prevalent institutions of mankind. It furnished the nearly universal plan of government of ancient society, Asiatic, European, African, American, and Australian.
Robert Brown noted the more complex motions of the protoplasm in the cells of Tradescantia in 1831; and now such movements of the living substance of plants are well known to be some of the most widely-prevalent phenomena of vegetable life.
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