The new North-west. [volume] (Deer Lodge, Mont.) 1869-1897, 1893-02-11
fz!Il!!zIz51BIBBBBB8 fIIzz!zIla!!lzIHz55]BIBB8 9E IA RI; |l;
n -&-NAHJrESSEEh
aass@s3}ss!!ss::. -: rss@g sss-'-~
ADAMS vESTIBULE CAR.

eral years ago. The inventions are made
the subject of an illustrated treatise
with tile title, Atmospheric Resistance;
Its Relation to the Speed of Railway
Trains, With an Improved System of
Heating and Ventilating Cars"
If the theory advanced by Mr.. Adams
in this book works out in practice, the
invention will take place with those
which rank as great discoveries in the
science of mechanics.
Mr.. Adams claims that atmospheric
resistance is the predominating factor in
the resistance of trains; that it is the
one thing which checks high speed, and
that Of all forms Of resistance it is the
easiest to overcome. He declares that
the existing form of construction of cars
is unscientifc.
The inventions contemplate changes
that are expected to accomplish three
distinct objects:
First-A reform in general construction by
which atmospheric resistance is reduced to q
minimum with q consequent increase in speed
and decrease in the power required from the
locomotive.
Second-A new system of ventilation by
which air is admitted to the train only from
the front, WleTG IL IS Tree from uuSl, SMOKE
CRIME or cinders.
Third-An improved system of heating by
which the waste heat around the boiler and
freboX of the engine is collected and distrib-
uted through the cars of the train.
Opinions among railroad men who
have examined the plans are divided as
to whether the first OF second of the
above named features is Of the greater
value. The principle on which the first
is based is the 1nure nuHe1. Ill u1lupte4
devoted to atmospheric resistance and
the way in which it has been ignored in
the past the inventor and author says:
The modern passenger train is, Of all things
animate or inanimate, natural or artificial, the
one exception that attempts, while defying Il
self evident law of nature, to attain high We
locity. The bird, fish, the ocean steamship
yacht or sublaarine torpedo, the Indians az
row and the ilrupp projcctile, all conform to
tl.e common sense law that bodies shaped to
offer tho least resistance to the air can be pro-
pcltcd The more swiftly and economically. The
modern passenger train is succession of
planes seemingly erected with reference to re-
tnrding the motion Of the train and multiplying
the power exerted in the cylinders.
The writer then calls attention to the
fact that the pressure of moving air in
creases in proportion with the square
of the velocity. He quotes Sweaton's
well known formula to the effect that
the pressure of the wind per square foot
is equal to the square of the velocity in
miles per hour divided by 200.
Other authorities, including Traut-
wine. claim that the pressure is twice as
nucL. Mr., Adams recently conducted
series of experiments which indicated
that the pressures are slightly in excess
Of those named by Sweaton. A train Of
six cars presents not less than 600 square
feet of surface, which, at go miles an
hour, would absorb a propelling power
of 10,S00 pounds. When it is understood
that the average passenger locomotive
hasa tractivepowero of only Il, 000pounds,
it becomes apparent that atmospheric
resistance is absorbing over IS per cent
of it's total capacity. Mr.. Adams claims
that by his construction he can reduce
the exposed frontage Of a train of six
cars from 600 to 160 square feet, and that
at go miles an hour the atmospheric pres
sure will therefore be reduced from
10000 to 1850 pounds. In chapter on
the properties of the atmosphere the in
ventor writes as follows:
The air surrounding this earth is not the thin,
vapid substance which tho unrefecting layman
or railroad engineer seems to regard it. 1t has
SO far as hindrance is concerned, much Of the