1,755 stations, containing 6,196
instruments, through which about 3,400,000 telegrams were sent. In
addition to the lines on British soil, the Submarine Telegraph Company
has cables stretching to Calais, Boulogne, Dieppe, Jersey, Ostend,
Hanover, and Denmark, with which the other lines are more or less in
connection, covering 887 miles with 2,683 miles of wire. This company
has upwards of 3,000 stations on the Continent. The messages sent by it
to and from foreign countries were, in 1861, 230,000; in 1862, 310,595;
and in 1863, 345,784.

France possesses a system comprising 71,034 miles of wire and 1,301
stations, which transmit about 1,500,000 private dispatches annually,
and nearly 175,000 official ones. Russia has 36,663 miles of wire;
Austria, 22,230; Italy, 20,120; Prussia, 24,149; Spain, 17,743; Belgium,
3,773; Switzerland, 3,720; Turkey, 6,571; Persia, 2,500; Greece, 3,000;
India, 10,994, and 136 stations; Australia, 12,000; South Australia,
2,000; the United States, 120,000; the British Provinces in America,
20,000;--making a total of upwards of 440,000 miles of aerial wire in
operation in all parts of the world.

* * * * *

The following tables give the details of the principal cables hitherto
laid by all makers. They are divided into three heads: 1st, Those which
have been wholly successful, and are now working (September, 1865); 2d,
Those which were partially successful, having worked for a time; 3d,
Those which wholly failed, or never worked after their submergence.

TABLE I.

_Submarine Telegraph Cables which are now in Successful Working Order._

Column A: No.
Column B: Date when laid.
Column C: From
Column D: To
Column E: Number of conducting wires.
Column F: Length of cable in statute miles.
Column G: Length of insulated wire in statute miles.
Column H: Maximum depth of water in fathoms.
Column I: Weight in tons per statute mile.
Column J: Length of time the cables have worked. Years.

A B C D E F G H I J

1 1851 Dover Calais 4 27 108 30 6.00 14
2 1852 Keyhaven Hurst Castle 4 3 12 .. .. 13
3 1853 Denmark Across the Belt 3 18 54 15 4.00 12
4 1853 Dover Ostend 6 80-1/2 483 30 5.75 12
5 1853 Firth of Forth ... 4 5 20 .. 7.00 12
6 1853 England Hol