Acted for Submarines from The Story of Great Inventions
by Elmer Ellsworth Bums
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Sometimes, submarines can be seen
from an airplane
Successful navigation beneath the surface of the water
though not carried to the extent imagined by Jules Verne, was a
reality at the beginning of the twentieth century. Instead of
twenty thousand leagues under the sea, less than a hundred
leagues had been accomplished but no one can foretelt what
the future may have in store
The submarine is primarily utilized in wars. The weapon used
by the submarine is the torpedio. The torpedo is itself a small
submarine able to propel itself and it started in the water
toward a certain object to go under water straight to the mark
It carries a heavy charge, either of guncotton or dynamite
which explodes when the torpedo strikes a solid object, such as
a battleship
It would be very difficult for one submarine to fight another
for the submarine when completely submerged is
not see in the water to find its enemy. The
torpedo-boat destroyer is able to destroy a submarine by
torpedoes shells full of high explosives, or quick firing guns
Advantage must be taken of the moment when the submarine
to the to get a view of her enemy
One of the great enemies of the submarine will probably be
the airship for while the submarine when under water cannot
be seen from a ship on the surface, it can under favorable
conditions, be seen from a certain height in the air.
The rising and sinking of the submarine depend on the
Certain submarines have a special
chamber for divers
submarine for
Dind. it
mi
Most submarines are created solely
for military purposes
comes to
surface
Submarines either rise or submerge
by displacing water
All submarines must be sure not to
descend too far underwater,
Edertunghis reserved