A shorter course in woodworking; a practical manual for home and school . the _ ^]^?^^^^ surface above or below the edges. On the other hand, when the board is warped as in Fig. 45, the Fig. 45 surface is winding, A well-trained eye is one of the most valuable possessions of askilled workman. Therefore do all the testing you can by eye beforeusing instruments. When planing the edge of a board, for instance,sight lengthways toward the light (Fig. 46). If you can see that theedge is too high or too low anywhere, do not stop to apply a straight-edge, but plane until it looksstraight. Use the stra
A shorter course in woodworking; a practical manual for home and school . the _ ^]^?^^^^ surface above or below the edges. On the other hand, when the board is warped as in Fig. 45, the Fig. 45 surface is winding, A well-trained eye is one of the most valuable possessions of askilled workman. Therefore do all the testing you can by eye beforeusing instruments. When planing the edge of a board, for instance,sight lengthways toward the light (Fig. 46). If you can see that theedge is too high or too low anywhere, do not stop to apply a straight-edge, but plane until it looksstraight. Use the straight-edgeonly as a final test (Fig. 47).Always look toward the light. Ifany shows through, the edge isnot straight, but must be planeduntil the straight-edge touches itthroughout. In the same way, toF;g_ 46 determine whether a broad sur- face is true sight across it fromdifferent directions (Figs. 48, 49, 50), lengthways of the surface,crossways, and diagonally, finally using the straight-edge (Figs. 51,52, 53). When the surface is true, the straight-edge (in whatever. Common Tools and Their Uses 19 -^3Hrr»^
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