solution of soap and water through the pipe, _g_, which runs from the
reservoir, G'.

The saw is kept from deviating from its course by movable guides
placed on the sliders, D and D'. These guides, H and H', each consist
of a cast iron box fixed by a nut to the extremity of the arms, _h_
and _h'_, and coupled by crosspieces, _j_ and _j'_, which keep them
apart and give the guides the necessary rigidity.

The shaft, _m_, mounted in pillow blocks fixed to the left extremity
of the frame, receives motion from the motor through the pulley, _p_,
at the side of which is mounted the loose pulley, _p_. This motion is
transmitted by the drum, M, and the pulley, L, to the shaft, _l_, at
the other extremity. This latter is provided with a pinion, _l'_,
which, through the wheel, F', gives motion to the saw. The shaft, _m_,
likewise controls the upward or downward motion of the saw through the
small drums, N and _n_, and the two pairs of fast and loose pulleys,
N' and _n'_. This shaft, too, transmits motion (a very slow one) to
the four screws, _g_ and _g'_, in the interior of the columns, and the
nuts of which are affixed to the sliders, D and D'. To this effect,
the shaft, _q_, is provided at its extremities with endless screws
that gear with two wheels, _q_', with helicoidal teeth fixed near the
middle of two parallel axes, _r_, running above the table, B, and
terminating in bevel wheels, _r'_, that engage with similar wheels
fixed at the end of the screws, _g_ and _g'_.

The car that carries the block to the saw consists of a strong frame,
E, mounted upon four wheels. This frame is provided with a pivot and a
circular track for the reception of the cast iron platform, E', which
rests thereon through the intermedium of rollers. Between the