It will be seen that, about the middle of the scale,
the dotted line coincides nearly with the full line, while at the
extreme end of the scale the dotted line is higher. From this follows,
that if we compare our indicator from which this curve was taken with
any form of tangent instrument showing an equal angle of deflection at
the medium reading, it will be seen that the needle of our indicator
will be deflected to a greater angle at high readings than that of the
tangent galvanometer. Consequently, the divisions on the scale will
be widest apart in our instruments, which greatly facilitates high
readings.
* * * * *
SECONDARY BATTERIES.
The Consolidated Electric Light Company has now completed the secondary
battery which has for some time engaged the attention of its officers,
and their regular manufacture and use for electric lighting stations
have been fairly entered upon. Among other places to which the batteries
have been sent and put into work is Colchester, where the company
has for some time had an installation at work, chiefly employing
incandescent lamps.
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