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FITTINGS AND FURNITURE
119
ladders have hooks at the end of each side-bar, and a second pair at a distance of about three feet from the end. When in use the ladder rests upon the fixed bar, and is held firm by the top hooks, and when not in use it is hung up on the bar by the lower hooks, and rests against the bookcase.
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An American adaptation of this principle is seen in the "Victor" library ladder, of which an illustration is given in Fig. 57. The ladder runs upon a brass or hard wood rod screwed to the face of the bookcase at a suitable height. The rod is gripped between the grooved edges of two small wheels on each side of the ladder, and also has wheels at the foot upon
