THE editors emphasize the need for critically appraising contributions of major significance rather than attempting a mere catalogue of papers, so that presumably this year's reviews, of which there are twenty-five, have been written from this point of view. Even so, they are mostly so highly specialized as to be too difficult for anyone but the experts.
Annual Review of Biochemistry
James Murray Luck James H. C. Smith. Vol. 8. Pp. ix + 676. (Stanford University P.O., Calif: Annual Reviews, Inc., 1939.) 5 dollars.