Paragraph 13. In boring in the edge of material for dowels, it is well to square a line across the surface of the board as a guide to determine when the bit is held exactly perpendicular to the working edge. The material should be fastened in the vise as nearly straight up and down as possible and at a convenient height for the boring, as shown in Figure 30. The brace should be held so that it will be perfectly firm and so the bit will constantly stand in a straight line with the line which is squared on the working face of the material. Of course it is necessary to watch carefully to hold the bit in line in the other direction so it will not run out sidewise on the board.

Note: Another very good way of testing to make sure the boring is being done perpendicularly is to use the try-square as shown in Paragraph 11. It should be held with the handle against the edge of the board, the blade will then indicate the proper position for the bit.

Figure 30.

Figure 30.