For example, a discharge could be easily sent through a
tube many feet long, but the introduction of a small pellet of mercury
in the tube stopped the discharge, although the conductivity of the
mercury was much greater than that of the vacuum. In some cases he had
noticed that a very fine wire placed within a tube on the side remote
from the primary circuit would prevent a luminous discharge in that
tube.
[Illustration: FIG. 4.--Exhausted Secondary Coil of One Loop
Containing Bulbs. The discharge passed along the inner side of the
bulbs, the primary coils being placed within the secondary.]
* * * * *
THE ELECTRICAL MANUFACTURE OF PHOSPHORUS.
Dr. Readman, at the May meeting of the Glasgow Section of the Society
of Chemical Industry, gave a description of the new works and plant
which have been erected at Wolverhampton for the manufacture of
phosphorus by the Readman-Parker patents. The process consists in
decomposing the mixture of phosphoric acid, or acid phosphates and
carbon, by the heat of the electric arc embedded in the mass.
* * * * *
LAYING A MILITARY FIELD TELEGRAPH LINE.
The 1st Division of the Royal Engineers, Telegraph Battalion, now
encamped at Chevening, close to Lord Stanhope's park, as a summer
exercise is engaged in running a military telegraph field line from
Aldershot to Chatham.
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