The Salt Lake herald. [volume] (Salt Lake City [Utah]) 1870-1909, 1896-08-10

tanks along the SIDES OF the BOAT, so
arranged that when oil is taken from
a tank an equal weight of water is adj
mitted to a chamber beside it, called a
compromising tank, in order that the
trim of the boat may not be affected.
The space aft of the boilers is occupied
by the engines, the air compressor,
more storage battery cells and two
motors, one of which works the stern
vertical screw fixed in a well similar
to that in the bow, and the other oper-
ating the horizontal screw, which pro-
pels the vessel when 1T is submerged.
HAS THREE PROPELLERS.
There are three horizontal propellers
on the boat. Two of these are fixed like
the twin screws OF any ordinary vessel,
and are used when the boat is running
light or awash. The third is a smaller
screw, placed above them, which will
be used in submarine work.
There are three rudders at the stern
of the bOat-one vertical, for steering
in the horizontal plane, and two hori-
zontal, for steering in the vertical plane.
These rudders are each rugged with in
genius automatic mechanis1ns.
When the vessel is running ON the
surface at fun speed and it is desired
to dive, the ballast tanks will be al
the boiler will be extinguished, the
stack and ventilator shaft shipped into
the boat and the cover of the aper-
ture through which they are drawn
swung around and cdamped. The for
ward ends Of the diving rudders will
be thrown upward, and then the vessel
will descend. When the level at which
it is desired to run is reached, the au-
tomato apparatus which controls the
horizontal rudders will be put into &C
ton. If, by accident, this mechanism
fails and the vessel descends to a
greater depth than is desired, the pres
sure of the water on the piston will
cause the opening of a valve, which
will admit such a. heavy pressure of
air to the bow ballast tank that about
1,500 pounds of water will be expelled
from the boat, reducing her weight so
much as to give her a strong tendency
to r4se.
The first part of the submarine run
will be made under the steam left i'm
the boilers when the rest were put out.
When it is exhausted the propeller
operated by electricity will be started.
While running, the vessel, of course,
will retain her slight upward tendency,
but this is to be overcome by keeping
the forward end of the horizontal rud-
ders slightly raised. If it is desired
that she lie still under water, the pro-
peller can be stopped, water admitted
to the ballast tanks until she retains
an upward tendency equal to 375
pounds and the vertical screws put in
motion to neutralize this buoyancy.
The boat can be trimmed by a shifting
of the ballast, or by an increase, de-
crease or reversal of the motion of
either of the vertical screws.
THE CAMERA LUCIDA.
The boat will also carry a camera lu-
cida, which can be pushed up in tube
four and a half feet above the top of
the turret. By means of this optical
apparatus the pilot in the coming
tower can view the surface of the sea
on every side when the craft is run
ming with four or five feet of water
over the turret A Fleuss diving he'll
met will be provided for every member
Of the crew. In case of disaster when
submerged, such as the filing of one
of the water tight compartments, the
men can put on these helmets, allow
the boat to fill with water gradually
and then escape to the surface through
the companionway.
AS a means of replenisFing. the air
supply while submerged, there will be
fastened TO the exterior Of the boat a,
small nOaI, 10 winch VIII be aLfacneQ
one end of a tube, the other end of
which connects with the air compress
sing machinery. This float, when cast
loose, will carry the tube to the sur
face and give the boat direct con-
nection with the atmosphere. Eight
dead lights on each side of the hull
will admit light when she is running
on fhe surface, and when she is trav-
cling submerged incandescent lights
will illuminate her. All her movements
will be controlled from an electrical
switch board in the coming tower
The boat must be capable of descend
ing to a depth of seventy feet, but in
actual warfare it would not be neces-
sary to go below forty feet. If she
went below seventy feet she would be
in danger of being crushed by the
great pressure of water above.
Upon the success of this boat de-
ponds the building Of two other sub
marines which the secretary of the
navy is empowered to have built. But
the contracts for these boats will not
be awarded until the efficiency of the
Holland boat has been demonstrated.
PROFITABLE DAIRYING.
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