A knife is used to lay out work that must be quite accurate, such as joints. Where accuracy is not so important a pencil may be used. Pencil lines should be made with a well sharpened lead, however. A good rule to observe in bench woodwork is: Use a knife and gage for laying out except where a finished surface would be permanently injured.

Fig. 12. Thumb gaging Width

Fig. 12. Thumb-gaging Width.

Figs. 12 and 13 illustrate two ways of marking a board to width roughly, preparatory to rough sawing. Where the . original edge is fairly straight, thumb-gaging is resorted to. Where the edge is not straight two measurements for width are made, one at each end of that part of the board to be removed, and a straight-edge used to connect these. Length in either case will be measured from the end of the board, leaving enough margin to allow for checks at the end of the board; and the try-square or framing square and pencil are used to draw a line straight across the board.

Fig. 13. Marking Width with Straight edge

Fig. 13. Marking Width with Straight-edge.