_North American Review_.--The April number is for the most part excellent. But we are forcibly reminded by it of a defect in the Reviews of this country, which it seems to us, might with some little exertion, be remedied. The fault to which we allude, is their tardiness in noticing the publications of the day. In this number of the North American, we find several pages devoted to a review of _Burkhardt's Travels in Africa_, which have been before the public _sixteen years_, while the crowd of new works of undoubted merit which fill our book stores, have not as yet, with but few exceptions, attracted the attention of the reviewers. In this book-making age, we are aware that it is impossible for a Quarterly to review the twentieth part of the productions constantly issuing from the press: but if, as we suppose, it is the design of these periodicals to direct the taste of the public in every department of science and literature, surely they should contain reviews of such works selected from the mass, as are best worthy attention; and should endeavor to keep pace with the stream of publication. We can see little value in a review of a book after every reading man in the community has perused it, and formed his opinion upon its merits. Thus to lag behind the march of current literature, deprives the criticisms of the reviewer of much of their value and weight. In the instance to which we have alluded, it might well be asked whether the travels of Burkhardt, English reviews of which we read ten or twelve, or more years ago, could have the same claim upon the public interest as the newer works of Burnes, Jacquemont, Bennet and many others, whose books possess the charm of novelty? We subjoin the contents of the April number: 1. Politics of Europe: 2. Coleridge: 3. Mineral Springs of Nassau: 4. Life of G. D. Boardman: 5. National Gallery: 6. Italy: 7. Last Days of Pompeii: 8. Immigration: 9. Burkhardt's Travels in Africa: 10. Popular Education.