Transmutation Notebook B, Pages 214-215
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[…]The difference intellect of Man & animals not so great as between living thing without thought (plants) & living thing with thoughts (animal).
∴ my theory very distinct from Lamarcks Without two species will generate common kind, which is not probable; then monkeys will never produce man. but
both monkeys & man may produce other species., man already has produced marked varieties & may someday produce something else., but not probable owing to mixture of races.— When all mixed & physical changes (intellectual being acquired alters case) other species or angels. produced &