Under such conditions, and at a velocity of 30 revolutions per minute in
the two cylinders, it will take but a fraction of a minute to finish
a bar the length of the table, that is to say, 1.5 meters. Then, by
loosening the upper cylinder, the bar may be easily shoved along in one
direction or the other, so as to continue the finishing operation
on successive lengths. This moving of the bar forward is further
facilitated by the aid of a clamp with rollers and a movable socket,
V (Figs. 8 and 9). For large diameters (150 millimeters and beyond)
traction is employed by the aid of two small windlasses placed opposite
each other, and at a distance apart twice the greatest length of the
bars to be finished. The chains of these windlasses are attached to the
extremities by clamps that lock by the pulling exerted.

The details of the arrangement of the saws (Figs. 5 and 6) show that to
make a section of the ends or of any other part of the bar, it is only
necessary to lower the lever of one them. By reason of the contrary
rotation of the bar, the effective stress on the lever will be very
moderate, while the cut produced will be a clean and quickly performed
one. It should be remarked that, as a consequence of the cone on the
projecting extremity of the cylinder journals (Fig. 5), and on the
rollers that control the saws, it is only necessary to move the lever to
the right or left in order to stop the motion of each of the saws. These
latter, to prevent all possibility of accident, are inclosed within
semicircular guards. Finally, the controlling rollers are made of a
material which is quite elastic (compressed cardboard, for example), so
that they may roll smoothly and adhere well.

From what precedes, it will be seen that round iron bars of any diameter
will come from this apparatus completely finished. It will be seen
also that with cylinders of suitable profile, there might likewise be