There is no mystery
about the battery. Any one can make it. All that is required is a
plate of zinc, two plates of carbon, some strips of wood and copper,
and two common wood screws for each cell. The tumblers may be had
anywhere.
Although it is advisable to use insulated wire for making the
electrical connections, bare wires may be used if care is taken in
arranging them, so that they will not touch each other or other
metallic objects which would complete the circuit.
It will be found convenient if the elements of the battery are
arranged upon a frame of some sort, by means of which they may be
raised or lowered all together, and supported at any desired height.
* * * * *
THE ACTION OF THE SILENT DISCHARGE ON CHLORINE.
Arguing from the fact that oxygen gas, when subjected to the silent
discharge, partially undergoes condensation into ozone, it seemed
possible, says Mr. H.M. Vernon, in the _Chemical News_, that other
elementary gases, as chlorine and bromine vapor, might undergo an
analogous change when subjected to the same treatment. A glass tube,
with a U-shaped index of fine bore glass tubing, was filled with
purified and dried chlorine.
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