. The book, its history and development. the back tofall in and the foredge to projectoutwards. As early as the fifteenth century,in the case of printed books onpaper, this fault of the back fallingin led some few binders to neutrahse it by giving the backof the book a rounded form by means of hammering, andthis quite prevented the falling in of the back. The exactextent of the rounding can easily be seen by looking at thefront edge of a book, because the curves of the back and frontcorrespond. The boards, however,remained in their first position,flat on the outer sheets. But another trouble w
. The book, its history and development. the back tofall in and the foredge to projectoutwards. As early as the fifteenth century,in the case of printed books onpaper, this fault of the back fallingin led some few binders to neutrahse it by giving the backof the book a rounded form by means of hammering, andthis quite prevented the falling in of the back. The exactextent of the rounding can easily be seen by looking at thefront edge of a book, because the curves of the back and frontcorrespond. The boards, however,remained in their first position,flat on the outer sheets. But another trouble was appa-rent in both these cases, namely,that when such books were opened,the joint between the boards andthe back showed a tendency to pullup the few pages next adjacent,became torn and injured, and constructively there was some-thing wrong with the principle of attachment. Paper is soft, and when a rounded book was fittedwith hard boards and strongly pressed there would be acertain tendency for the boards to sink into the mass of the. Fig. 42.—Book withrounded back. In time these pages nOLLS, BOOKS .\ND BOOKBINDIXGS. 43
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Keywords: ., bookcentury1900, bookdecade1900, booksubj, booksubjectbookbinding
