Page:Library Construction, Architecture, Fittings, and Furniture.djvu/125

Rh with rounded edge and polished surface, a little smaller than the shelf upon which it is to be used. A fine spring of steel is attached by screws and nuts in a slot on one side, so that the length from end of spring to foot of brace is about half an inch more than the space between the shelves where it is to be used. The foot of the brace is placed against the

books, with the spring outward. On raising it to a vertical position the tip of the spring is pushed along the under side of the shelf above, and so keeps it firmly in position. The end of the spring is slightly curved to facilitate its removal, and when a book is taken away, it is easily pushed forward; the accompanying illustration, Fig. 42, shows how it is worked.