[Illustration: Fig. 6.]


4. TESTING FOR SMOOTHNESS. In testing for smoothness place the palm of
the hand, with the fingers extended straight, lightly on the back of the
cylinder opposite the tool rest. This position will avoid any
possibility of the hand being drawn in between the cylinder and the
rest.

[Illustration: Fig. 7.]


5. MEASURING FOR LENGTH (RULE AND PENCIL). FIG. 7. Hold the back edge of
the rule in the left hand and place it on the tool rest so that the
front edge is almost in contact with the revolving cylinder.

With a sharp pencil mark off the required length, starting from the dead
center end. The first mark should be just far enough in on the cylinder
to insure cutting past the point of the dead center. This will leave all
surplus stock at the live center end where it is needed, because, if not
enough stock is left at this end, there is danger of striking the live
center spur with the tool and of injuring the chisel and perhaps the
work.

In case several measurements are to be made, as in some of the following
exercises, the rule should not be moved until all are marked. This will
insure more accurate work than if the rule be changed several times.