screwed up tight, and the flange of the door, compressing the rubber
lining, renders the joint hermetical. The door, which is hinged, is
provided with a handle, which, when the stove is closed, slides over
an inclined plane fixed to the cylinder.

The steam enters a cast iron box in the stove through a rubber tube
provided with a threaded coupling. The entrance of the steam is
regulated by a cock. The box is provided with a safety and pressure
gauge and a small pinge cock. In the interior of the stove the
entrance of the steam is masked by a large tinned copper screen, which
is situated at the upper part and preserves the objects under
treatment from drops of water of condensation. These latter fall here
and there from the screen, follow the sides of the cylinder, and
collect at the bottom, from whence they are drawn off through a cock
placed in the rear.

The sides are lined internally with wood, which prevents the objects
to be infected from coming into contact with the metal. The objects to
be treated are placed upon wire cloth shelves. The pinge cock likewise
serves for drawing off the air or steam contained in the apparatus.

The stove is supported upon an axle through the intermedium of two
angle irons riveted longitudinally upon the cylinder. The axle is
cranked, and its wheels, which are of wood, are 4½ feet in diameter.
The shafts are fixed to the angle irons. The apparatus is, in
addition, provided with a seat, a brake, and prop rods before and
behind to keep it horizontal when in operation.

The boiler that supplies this stove is vertical and is mounted upon
four wheels. It is jacketed with wood, and is provided with a water