posed, by its editor. This character is admirably sustained by
the contents of the May number; "simplicity," indeed, is perhaps carried to excess in the opening sentences of "The Place of Iron in Nature," which runs thus :—" Few elements are more abundant in nature than iron, whilst none is more widely distributed. Its compounds pervade every portion of the earth's crust." But while there is "exact description," there is not ultra-simplicity in Mr. Lydekker's paper on "Some Strange Nursing Habits," in which the peculiarities of, among other creatures, the Surinam toad, are fully and lucidly described. Perhaps the most generally interesting, however, of the papers in this month's Knowledge, is Mr. Carl Siewers's "Baron von Toll's Expedition to the New Siberian Islands." There is nothing sensational or savouring of the "end of the century" in Knowledge, but it is all the more to be commended on that account.