Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

throw out

A map, table, diagram, etc., designed to be consulted regardless of the page of the text the reader is consulting. It is done by means of an extended guard (the size of the leaf of the book), to which the map, etc., is attached at the outer edge. If the map is to be folded, a compensation guard may be required to compensate for the thickness of the map. The map and its guard are usually printed on paper that differs from that of the text. (156 , 339 )