2) the plates are
formed of concentric leaden tubes fixed into a wooden cover. These tubes
are threaded internally and externally, and the grooves thus produced are
filled with a peculiar cement composed of litharge, powdered charcoal, and
permanganate of potash, triturated together, sifted, and then mixed with
glucose or sugar sirup so as to make a paste of them. This mixture forms a
cement that is very adhesive after, as well as before, the electrolytic
action.
[Illustration: FIG. 3.--KORNBLUH'S ACCUMULATOR.]
In Kornbluh's accumulators the plates consist of ribbed leaden gratings
between which is compressed red lead prepared in a peculiar manner, and
constituting, 48 hours after formation, a compact mass with the lead. The
tangs of the plates are widened so as to touch one another while leaving a
proper distance between the plates themselves, and are hollowed out for
the reception of a rod provided at its extremities with a winged nut and
jam nut for passing them up close to one another. The plates, properly so
called, are held apart by rubber bauds. The glass vessels are placed in
osier baskets.--_La Lumiere Electrique._
* * * * *
INDUSTRIAL MODEL OF THE REYNIER ZINC ACCUMULATOR.
The three models of a secondary battery that I recently made known to the
readers of this journal have been the object of continuous experiment.
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