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" "The same law of development presides over the vegetable kingdom. ...where a special function is required for particular circumstances, nature has provided for it, not by a new organ, but by a modification of a common one, which she has effected in development.
Robert Chambers (10 July 1802 – 17 March 1871) was a Scottish publisher, author, journal editor, geologist and evolutionary thinker.
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The peculiarity of six fingers on the hand and six toes on the feet... is then sometimes seen to descend through several generations. It was Mr. Lawrence's opinion that, a pair, in which both parties were so distinguished, might be the progenitors of a new variety of the race who would be thus marked in all future time. It is not easy to surmise the causes which operate in producing such varieties. Perhaps they are simply types in nature, possible to be realized under certain appropriate conditions, but which conditions are such as altogether to elude notice.
Now as there are, according to Humboldt, one hundred and seventy words in common between the languages of the new and old continents, and many of these are expressive of the most primitive ideas, there is, by Dr Young's calculation, overpowering proof of the original connection of the American and other human families.
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