When sharpening a saw with an emery wheel, apply the wheel to the face of the tooth whose set points from the operator. If the saw is ground against the set, that is to say, with the set pointing towards the operator, there will be some jarring, and consequently a less keen cutting edge. The fringe or burr caused by filing or grinding indicates that the face or top of the tooth, as the case may be, has been filed or ground to a keen edge; this burr, after a little work, disappears. If desired, the burr may he removed by a light touch with the topping file. The writer prefers to top the saw teeth with a second-cut topping file; this is better than topping them with an emery wheel. The faces of the teeth cannot he filed as accurately as they can be ground, and the tops cannot be ground as perfectly as they can be filed. Before taking the saw out of the sharpening machine, give each tooth alight wipe with the emery wheel; this will remove a portion of the burr and any little hardness that may have been caused in grinding.

By omitting this trifling detail, great difficulty is often experienced, and expense incurred, when topping with a file.