Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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1. The area of a page between the printed, written, or illustrative matter and the edges of the leaf. The four margins are usually called the "head" (or top); "fore edge" (or outer, outside, side); "tail" (or bottom foot); and "inner" (or back, inside, gutter, binding). The proportional width of the margins is an important element in a properly balanced book page. A good (and standard) ratio is: head 2 units, fore edge 3 units, tail 4 units, and inner 1 1/2 units (the opposing inner margins making a total of 3 units). In order for these ratios to exist following trimming, the head, fore edge, and tail margins must be greater by the extent of the trimming, which is usually /8 inch for each. 2. The area of a map, drawing, or print, between the line enclosing the information and the edge of the paper. (156 , 234 )

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