You can make a little notch with the knife or chisel on the outside of the line, to help start the saw, in the case of nice work, if you wish. Cut straight in just on the line and then make a sloping cut to meet this from outside the line (Fig. 659). First draw the saw gently backwards, guiding it by the thumb, with as little pressure on the wood as possible until you see that the cut is started right, then push it gently forward, and after a few easy strokes in this way to get the cut started right, keep on with long, steady strokes, but not long enough so that the end of the saw enters the kerf, lest it catch and the saw buckle. The saw should cut most on the downward motion, not on the up stroke.
Fig. 659.
With a sharp saw, there is nothing gained by bearing down heavily on the teeth, which may spring the saw and make crooked work. Rather let the saw run of itself with an easy, light stroke, guiding it carefully, and not letting it press on the wood on the up stroke. The more hastily and furiously you saw the poorer the result will probably be.
When you begin to run off the line, as you will be pretty sure to do, twist the saw a little with the wrist as you go on, which will bring it back to the line, because of the kerf being wider than the thickness of the saw-blade.
Fig. 660.
Beginners are apt to bend the saw over to one side. You can tell whether it is cutting at right angles with the face of the board by testing with the try-square as shown in Fig. 660. Such a test as this is, however, too inconvenient for ordinary practical work and you should learn as quickly as you can to hold the saw-blade correctly.
At the end of the cut, as at the beginning, saw gently with quick, light strokes, and hold the piece which is being cut off with the left hand, lest it break off and splinter one of the two pieces.
If the saw "binds" or does not work easily, you can for your rougher work put a little tallow, butter, lard, or lubricating oil on the blade, but beware of doing this for your nice work, or it will deface it when done. If the binding is caused by the springing together of the wood (Fig. 695) the crack should be wedged open.