On the Development and Distribution of Primitive Locks and Keys

by Augustus Henry Lane-Fox Pitt-Rivers

Wyman & Sons, Printers, G^t. Queen S^t. London, W.C.

PLATE II.

Figs. 18A to 22A. Old Scottish treble wooden tumbler lock (Patent Museum).

Fig. 18A. Front view.

Fig. 19A. Side view.

Fig. 20A. Longitudinal section.

Fig. 21A. Transverse section.

Fig.22 A. Section through A B (fig. 21A).

Figs. 23A to 25A. Wooden tumbler lock from Norway (Hazilius Museum, Stockholm).