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The fourth edition of Dr. Charles Darwin's "Origin of Species by Means of Natural Selection; or, The Preservation of Favored Races in the Struggle for Life," is just published by Murray. The London Reader remarks that this is far from being a mere reprint of the famous book. The additions and corrections are numerous and important, and the author has thrown most of them into tabular form for convenient reference.

Amongst the recent observations which help Dr. Darwin's theory, those of De Candolle on the variability of the oak-genus are not the least interesting.