material in powder derived from the evaporation of the wash is stored at
the extremity of the apparatus into a lixiviating vessel, G, provided
with a stirrer, H. The salts and other analogous matters are dissolved,
and the residuum, which constitutes a carbonaceous mass, is forced out
of the apparatus, while the solution passes directly to the refinery,
where it is evaporated.

[Illustration: APPARATUS FOR THE EVAPORATION OF ORGANIC LIQUIDS.]

In manufactories where no refining is done, the crude potassa in powder
is pushed on to a prolongation of the apparatus which is cooled by means
of water, and is removed from time to time with shovels by the workmen,
so that the orifice of the boiler remains constantly covered externally
by the mass, and that the air cannot re-enter the apparatus.

The gases disengaged during the operation pass into a cooler, where they
condense into a liquid which contains ammonia and methylamine. The
non-condensable part of the gases is burned in the furnace of the
manufactory.

* * * * *




IMPROVED LEVELING MACHINE.


In the American Court of the Inventions Exhibition, London, we find a
leveling machine for sheet metals exhibited by Mr. J.W. Britton, of