Firs on the distant hill-tops ; within the last ten years large spaces have been enclosed, and self-sown firs are now springing up in multitudes, so close together that all cannot live. When I ascertained that these young trees had not been sown or planted,... On the Origin of Species by Means of Natural Selection; Or, The Preservation ... - Page 70 by Charles Darwin - 1861 - 440 pages Full view -
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