ARMORING MACHINE

Here is one of the machines used for armoring the cable. By armoring

is meant winding steel wires around and around the cable to protect it

from being cut by sharp rocks on the bottom or by deep sea animals like

the teredo, which might attack it.]

[Illustration: The “Great Eastern” which was the first ship to carry a

cable across the Atlantic Ocean.]

[Illustration: This is a section of a telephone cable, known as a

“bulge.” It contains inductance coils to offset what is called the

condenser capacity of the cable, which would otherwise cause the

talking to become blurred.]

[Illustration: THE DOTS AND DASHES WHICH FLASH ACROSS THE SEA

The book of wonders · 第 221 / 376 题