New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1897-05-23

troed by the pressure Of tho water outside. can
be connected with the horizontal rudder when the
boat Is submerged. and will keep her at uniior"
depth. At such times. ms at night the interior VI
the boat can be lighted with electricity.
While under water the pilot is obliged to steer
BY his compass. He goes by faith, not by ssh''
This, however. 10 precisely whasall ocean eteain-
ships do after getting fairly at sea-
VIEW ABOVE WATER.
When engaged In actively aggressive operations
OF course. the commander can rise every few min
utes Just far enough to thrust up his coming
tower and take fresh observation OF the enemy
position. and then drop down a few feet again.
This proceeding need not expose him for more
than few seconds The tower Is proof against
bullets. In case he should be within range OF small
arms and It is too small for a big gun to be aimed
at II with dangerous accuracy.
another device, modification Of the camera
is completely submerged merged This &c" Consists Of mir
I ror, lens and tube, which can be thrust l., Up
Of the vicinity, Some differences Of opinion, exist
as to the practical value of this apparatus. What
ever may be thought on this point. however the
coming tower can be so easily employed. ana SO
safely, that the camera lucida seems to be un-
1t Is a matter Of course that when submarine
boat remains under water Tor more than few w
specially. provided. or else the crew. viii perish
the apparatus for disentangling life giving gases
from the water 1t Is customary therefore, to
valve through which this air escapes into. the yes
gel Is so adjusted es to maintain. In the space
spending TO that Of the atmosphere at sea level.
which Is fifteen pounds to the square inch. Auto
making good the losses from the escape OF expired
air. guards against wastefulness.
II Is estimated by Mr.. Holland that the boat
under construction in Baltimore can make about
seven or eight knots an hour for six hours with
the amount OF power stored in her electric accu-
carry charge sufficient to do the work.
hour at the rate Of thirteen knots. Every one
familiar with the use Of storage batteries is aware
charge cannot be exceeded without damage to the
battery. Unless the latter be especially designed
by squirting.
The means by which these craft are navgated
their crews having been described. Il now remains
TO consider their equipment for offensive purposes
and what the inventor claims that they can do.
THE FIGHTING IMPLEMENTS.
In the first place. the Ellzabethport boat has
single expulsion" tube for the discharge of ord-
nary Whitehead torpedoes. The tube opens out
forward, and Is arranged In the axial line OF the
craft Whitehead torpedoes, It is hardly necessary
to remind any reader Of The Tribune are self pro-
Polling; and; having once been launched. will travel
from $50 to 1000 yards. They are nearly twelve feet
long. eighteen inches In diameter. and carry a
charge Of wet gun-coton weighing 100 to 80 pounds
The new boat will have three Of these torpedoes
in her magazine when fully equipped. The Balt-
more boat has two expulsion" tubes one on either
side OF her bow, and should be provided with five
smaller boat has Is an aerial gun. This is ar
ranged directly above the expulsion tube. and Is
the air Mr. Holland believes that II viii throw such
q projectle fully mile, and II 1t be properly aimed