[Illustration: FIG. 2.--SECTION.]

We have stated that the regulator, C, serves to automatically regulate
the flow of the liquids proportionally to the consumption of the gases
produced. To effect this a communication is established between the
regulator receiver, 59, and the aperture through which the liquids flow,
and the flow is thus modified by the valves, 54 and 55.

The water contained in the reservoir of the regulator serves to wash the
gas which enters through a number of orifices in the disk, 60, this
latter being fixed beneath the level of the water. The gas may be
purified by dissolving metallic salts in the water.

By means of the arrangement above described, there may be manufactured at
will a rich gas from liquid hydrocarburets, hydrogen from water, and gas
obtained by an admixture of two others simultaneously produced and
combined in the apparatus.--_Chronique Industrielle._

* * * * *




SUGAR NITRO-GLYCERINE.


A new explosive has been discovered by M. Roca, a French engineer, who
communicates an account of it to _Le Génie Civil_. The discovery was due
entirely to scientific induction from some experiments made upon