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BOTANY.

"FERTILIZATION OF ORCHIDS," by Charles Darwin, F.R.S.—We have received a copy of the second edition of this, one of the most striking of all Darwin's works. It was the first to call attention to the various contrivances by which Orchids, both native and exotic, are fertilized by insects; and how the seemingly strange and fantastic shapes and structural parts of these singular plants could only be understood from this point of view. A good deal more has been learned concerning Orchids since Mr. Darwin first drew attention to them, and in this second edition we find all the new discoveries included. We are glad of a reprint of this valuable book, which it has been impossible to purchase for two or three years back, owing to its being out of print.