The cross-head carries two bearings, _g¹_, to which is jointed the
forked extremity, D, of the connecting rod, whose opposite extremity
receives a strap that embraces the cranked end of the driving shaft,
A. It will be remarked that the crank, A¹, and the bearings, _g¹_,
are very long. The end the inventor had in view in constructing them
thus was to diminish friction.

To the shaft, A, are keyed the coupling disks, Q, which are cast solid
at a portion of their circumference situated at 180° with respect to
the parts, A², of the cranked shaft, the object of this being to
balance the latter as well as a portion of the connecting rod, D.

The shaft, A, also receives the eccentric, E, of the slide valve, the
rod, _e_, of which is jointed to the slide valve rod through the
intermedium of a cross-head, _e¹_, analogous to that of the pistons,
and which, like the latter, runs on guides held by the support, b.

The two pistons, _p_ and P, are mounted very simply on the rod, T, as
shown in Fig. 1, and slide in cylinders, _c_ and C, whose diameters
are respectively equal to 270 and 470 millimeters.

The slide valve box, F, is bolted to the cap-piece, B¹, as seen in
Fig. 4. As for the slide valve, _t_, its arrangement may be
distinguished in section in Fig. 2. Its eccentric is keyed at 170° so
as to admit steam into the small cylinder during the entire travel,
which latter is 470 mm.

To permit of the expansion beginning in the small cylinder, Mr. Farcot
has added a sliding plate, _t¹_, which abuts at every stroke against