The Origin of Printing in Europe. By Pierce Butler. [The University of Chicago Studies in Library Science.] (Chicago: University of Chicago Press. 1940. Pp. xv, 154. $1.50.) and Printing in the Fifteenth Century. By George Parker Winship, Rosenbach Fellow in Bibliography. [The A. S. W. Rosenbach Fellowship in Bibliography.] (Philadelphia: University of Pennsylvania Press. 194o. Pp. xi, 158. $2.00.)