In a direction with the radii of these dials there are
four superposed levers, each of which is actuated by one of the electros.
On another hand, each dial is divided into four zones that correspond to
the four cardinal points. When a shock coming from the north, for example,
produces a contact, the corresponding electro is affected, and its lever
falls and marks upon each of the dials a point in its north zone. We thus
obtain the exact hour of the shock, as well as its direction. As may be
seen, the apparatus, as regards principle, is one of the simplest of its
kind.--_La Lumiere Electrique._
* * * * *
NEW ACCUMULATORS.
[Illustration: FIG. 1.--ARNOULD & TAMINE'S ACCUMULATOR.]
In Messrs. Arnould and Tamine's accumulators, shown in Fig. 1, the
formation is effected directly by the current, as in the Plante pile, but
the plates are formed of wires connected horizontally at their extremities
by soldering. These plates are held apart either by setting them into
paraffined wooden grooves at the ends of the trough or by interposing
between them pieces of paraffined wood.
[Illustration: FIG. 2.--BARRIER & TOURVIELLE'S ELECTRODOCK.]
In Messrs. Barrier and Tourville's _Electrodock_ (Fig.
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