Scientific American Supplement, No. 623, December 10, 1887 by Various


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Page 26

Two obstacles at present lie in the way of this consummation--the cost
of the oxygen and the want of a convenient and completely refractory
material to take the place of the lime. Messrs. Brin believe they have
overcome the first obstacle, and are addressing themselves, we
believe, to the removal of the second. Again, the intense heat which
the combustion of carbon in cheap oxygen will place at the disposal of
the metallurgist cannot fail to play an important part in his
operations. There are many processes, too, of metal refining which
ought to be facilitated by the use of the gas. Then the production of
pure metallic oxides for the manufacture of paints, the bleaching of
oils and fats, the reduction of refractory ores of the precious metals
on a large scale, the conversion of iron into steel, and numberless
other processes familiar to the specialists whose walk is in the
byways of applied chemistry, should all profit by the employment of
this energetic agent. Doubtless, too, the investigation into methods
of producing the compounds of nitrogen so indispensable as plant
foods, and for which we are now dependent on the supplies of the
mineral world, may be stimulated by the fact that there is available
by Brin's process a cheap and inexhaustible supply of pure
nitrogen.--_Industries._

* * * * *




FRENCH DISINFECTING APPARATUS.


[Illustration: IMPROVED DISINFECTING APPARATUS.]

We represent herewith a sanitary train that was very successfully used
during the prevalence of an epidemic of _sudor Anglicus_ in Poitou
this year. It consisted of a movable stove and a boiler. In reality,
to save time, such agricultural locomotives as could be found were
utilized; but hereafter, apparatus like those shown in the engraving,
and which are specially constructed to accompany the stoves, will be
employed. We shall quote from a communication made by Prof. Brouardel
to the Academy of Medicine on this subject, at its session of
September 13:

In the country we can never think of disinfecting houses with
sulphurous acid, as the peasants often have but a single room, in
which the beds of the entire family are congregated. Every one knows
that the agglomerations that compose the same department are often
distant from each other and the chief town by from two to three miles
or more. This is usually the case in the departments of Vienne, Haute
Vienne, Indre, etc. To find a disinfecting place in the chief town of
the department is still difficult, and to find one in each of the
hamlets is absolutely impossible. Families in which there are invalids
are obliged to carry clothing and bedding to the chief town to be
disinfected, and to go after them after the expiration of twenty-four
hours. This is not an easy thing to do.

It is easy to understand what difficulties must be met with in many
cases, and so one has to be content to prescribe merely washing, and
bleaching with lime--something that is simple and everywhere accepted,
but insufficient. So, then, disinfection with sulphurous acid, which
is easy in large cities, as was taught by the cholera epidemics of
last year, is often difficult in the country. The objection has always
be made to it, too, that it is of doubtful efficacy. It is not for us
to examine this question here, but there is no doubt that damp steam
alone, under pressure, effects a perfect disinfection, and that if
this mode of disinfection could be applied in the rural districts (as
it can be easily done in cities), the public health would be better
protected in case of an epidemic.

In cities one or more stationary steam stoves can always be arranged;
but in the country movable ones are necessary. From instructions given
by Prof. Brouardel, Messrs. Geneste & Herscher have solved the problem
of constructing such stoves in a few days, and four have been put at
the disposal of the mission.

Dr. Thoinot, who directed this mission, in order to make an experiment
with these apparatus, selected two points in which cases of _sudor_
were still numerous, and in which the conditions were entirely
different, and permitted of studying the working of the service and
apparatus under various phases. One of these points was Dorat, chief
town of Haute Vienne, a locality with a crowded population and
presenting every desirable resource; and the other was the commune of
Mauvieres, in Indre, where the population was scattered through
several hamlets.

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