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Scientific American Supplement, No. 821, September 26, 1891 by Various
page 61 of 161 (37%)
involve considerable risk to the jointer, and where possible the circuit
to which the connection is to be made should previously be cut dead.
Where the voltage is not dangerous to human life, almost any service
connection can be made without interruption of service.

I have only indicated a very few of the operations that may be found
necessary, and the probable causes of troubles that may be encountered
in the operating of underground circuits, believing that the different
problems that arise can, with a little experience, be successfully met
by any one who has a fair knowledge of the original construction of
cable lines.--_Electrical World_.

* * * * *




RAILROADS TO THE CLOUDS.


If George Stephenson, when he placed the first locomotive on the track
and guaranteed it a speed of six miles an hour, could have foreseen that
in less than eighty years the successors of his rude machine would be
climbing the sides of mountain ranges, piercing gorges hitherto deemed
inaccessible, crossing ravines on bridges higher than the dome of St.
Paul's, and traversing the bowels of the earth by means of tunnels, no
doubt his big blue eyes would have stood out with wonder and amazement.
But he foresaw nothing of the kind; the only problem present in his mind
was how to get goods from the seaports in western England to London as
easily and cheaply as possible, and to do this he substituted for
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