The morning news. [volume] (Savannah, Ga.) 1887-1900, 1899-02-06

The only Pills to take with floods sarsauarilla.
raised by engineers who are willing to
grant that the boat will be able easily
to attain a speed Of 100 miles an hour in
stin water. In answer 10 this l have only
70 say that if the boat can go a mile
minute il can keep out Of the face OF
any gale. for storms travel in the form
of progressive circle. With such a speed
as that under discussion the boat can so
quickly shift her course as to put the wind
al her back and gee where the opposing
current of the gale cannot oVertake her
However, / take the position that no wind
can ever stop the roller boat, because the
greatest wind resistance the big ocean
roller can possibly encounter is 500 90 600
tons this cannot have any appreciabe
effect in overcoming the momentum of
a rolling cycinder weighing 5000 tons.
The lesser power must give way to the
greater.
And right here some engineers will ex-
claim that this conclusion is contrary TO
'well-esta blished scientific principles; that
momentum is not a force. not an energy;
that the engines of the boat must exert
sufficient steam power to overcome the
resistance of the wind independent of mo-
mentum, This is answered by a simple
illustration, the basic facts of which no
well-informed engineer will dispute. An
ordinary locomotive developing speed or
a mile minute is mounted on Holman
trucks and thereby increases its speed to
two miles a minute, meeting a wind re-
sistance of more than 5000 horsepower.
while actually cxerting only / $50 horse
power of steam force.
In this operation the engine does not
Increase its pistol speed While its driv-
ers are working at the rate of a mile
minute the geared trucks increase its act
ual speed on the track to two miles
minute. This means a tremendous increase
OF wind resistance without any increase of
steam power Now what force is it that
enables 800 horse power Of steam to over
come 1900 horse power of wind resistance?
There is but one answer: Momentum
the inertia Of motion maintained by the
continuity of the initial steam power.
Advantages of the Roller Boat.
The broad and really scientific engineer
invariably accepts this illustration at its
full face value. 1t is only the theoretical
rule-of-thumb man who fails to recognize
its force. And this observation applies
u every principle involved in the con-
struction and operation of the roller boat
There are two or three simple and funda-
mental principles which help to make clear
the points of difference between the pres
ent type of ship and the roller boat so
far as the problem of speed Is concerned
The present ship is a huge pillow, the larg-
est portion of which must be submerged
in order 90 prevent 1t from being over
turned. It's progress is made by forcing
its way through an incompressible fluid
the resistance of which increases as the
cube of the velocity up to a speed of
wenty knots an hour, and beyond that
the ratio of the increase is unknown. II
is a question of brute force of engine
power, working against the force of ma
ture.
"On the other hand, the roller boat re-
verses the operation and works with ma
lures forces. Direct water resistance and
skin friction are its friends which help
instead of hinder its progress, furnishing
the leverage necessary to produce the for
ward movement. Without the water re-
sistance which the Trails on the exterior
of the roller meet the cylinder would sim
ply roll over and over without any for
ward movement. The stronger the resist
ance the more easy and rapid its progress.
Then, the greater the speed of the roller
the less will be its draught. At very high
speed it will be practically in the position
of broad wheel rolling on a level sur
face.
Weight and Cargo Capacity.
''The weight of the big ocean vessel will
| be 5000 tons, and it win require 1000 tons
of cargo 10 put 1t down twelve feet into the
water. Its displacement as a freighter win
be so great that when it is drawing thirty
feet of water ID will be carrying 60 900 tons
| of cargo On the same draught as the lake
| vessels passing through the 500 the roll
er boat win carry a cargo three times
! greater 1t should be remembered that the
| interior circle of air-tight compartments
in the cylinder may be used for carrying
many kinds OF freight like coal, grain and
| ore. So long as the cargo of this character
| is equally distributed it will not interfere
with the proper action of the cylinder
which will remain at all times an evenly
! balanced fly wheel
| The freight boats will be so constructed
that trains may run into the boat, at the
| open end, unload and backed out upon the
| dock again. The loading and unloading of
| the compartments in the cylinder win be
accomplished with great facility. the roller
| being so turned that the compartments
| from which grain or ore are TO be unloaded
will be elevated above the level of the cars
| on the deck, into which the cargo is to be
| transferred. Unloading from the cars will
be done on the same principle, the COM
| partments for the reception of the cargo
| being brought lower than the cars. thus
making it possible for gravity to do the
main part of the work"
The absolute safety and indestructibility
| Oh thS foiieF boat IS a feature of intense
| personal interest to all who travel by wa.
| ter. The cylinder as a mammoth hfe pre-
| server, and the perforation of any consid
| cradle number of the air chambers would
not affect its buoyancy. The steel con.
| struction of the interior portion renders II
| indestructible by fire. If the machinery
of the roller boat were disabled and the
winds were to dash it on the rocks of q
sea coast it would remain unsuitable. ant
the accident would not result in loss of Hf,
or cargo. Such catastrophe as that which
! befell the Bourgoyne viii be impossible,
| with the roller boat.
Frederick A. Knapp the inventor. is z
successful Canadian barrister living a
Prescott. ontario. He has been at work or
his invention since 1892.
Forrest Crissey.
TWO MORE FOUND GUILTY.
Hardy and bailey Also Conx,to4s -.