turn-ins
1. The extra length and width of the covering
material of a book overlapping the head, tail, and
fore edge of the cover, and turned over the edges
of the board and glued to the inside surface. In
leather binding, the leather is usually pared
around these edges so as to make it thinner on the
inside of the boards. The extent of the turn-in
varies according to the SQUARES of the book,
the taste of the times, or the judgment of the
binder. 2. The extensions of a book jacket which
fold over the fore edges of covers of a book and
in over the inside of the covers. (82 , 156 )
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