New-York daily tribune. [volume] (New-York [N.Y.]) 1842-1866, 1851-10-31
The SroIIpIry OF INCONSISTENCIES

THr SToIIpITY OF MECHANlCs.-Und er
this head Mr. STEPHEN PEARL ANDREWS sends us
rerly to J. T. C's structures on Sawyer x Gwynnes
- New Motive Power :" from this reply We take the
following. Which are It's essential parts;
The first point is silly concelt that whereas cen
trfugal iorce is used 70 procure vacuum, WHEREBY
We are enabled 10 use the pressure oi 'he alAoS,
nhere As a motive power, and whereas centrHusdl
force increases IN higher ratio than the power ap
Piled which Is no. denied on either hand'l thal
therefore tie TapldIty Of the rotation must go on
continually acceeratlng. lie understands very ven
that Mir sawyer does not claim centrifugal fOfce Is
aprouelng pow err asserting, on the contrary, that II
Is only the aSurc or limit to which ne real PrPt.
ing pOteG-the atmospheric pressuIe-cah oe ene't.
lyeN applied pr0rided arrays thal lls ldlei po"0i
The almost herlc pressuTe-be present 10 apply.
Our critic sagacousy assumes thar TINS Vital us1V
ton me ans nothing, and then goes on 10 "otA ou'
such conclusions as 10 nm seem good, as VINO
could not If allowed 10 com his own facts THIS as
sumptlOn is Iust as wise would De 10 assume VI A.
iIasmuch the speed of sailing 'esseI Is ."IttE
bv the breadth OF sail which II carries therefore
vessel can double It's speed inevitably, whether in
stiff breeze or dead calm, by simply doubling
It's amount of canvass The cases are precisely par
abel The sails of the ship are not the propeulhe
mower of the ship They are the measure or limit
In which the ptopelllng power, the atmospheric
pressure (of the Wludl can be apnued 10 produce
motion. SO the centrifugal force ana the vacuum
resulting nom il not the propelng power OF me
machine They are the measure or limit 10 Whlcn me
propeHlng poweT-the atmospheric pressure lol the
natural or compressed atmospherel-can be applied
to produce motion. | hope this simple exposition
of the matter VIII put at resi- forever Ine S oea o
perpetuai acceeratlon. The velocity OF the ma.
chine can be accelerated exactly up to the speed
due 10 the gtren amount y dfm0sphfrc pressure 10 Ns
square inc1 on the head OF the piston or the screw
If the centrifugal force Is then IN excess that excess
can only be used by increasing the pressure of the
compressed atmosphere.
Our crltlc next stumbes upon one of the same
bmnders which was concusIyely replied TO by Mr..
IN no fisguSSOu with Prof. Looms. name
w. that the valve IS pressed down by the same
weight OF atmosphere which acts for driving the
machine 1t would be abusing your patience to en-
ploy your columns for repeating the retutaton OF
blunGers fallen into by men, who, persstlng IN be-
heyng that the whole matter Is an absurdlty, re-
fuse To examine and understand It.
Your correspondent next tres the Old dodge OF
stgmatizng MIR. SawyerS invention as a perpetual
notion" and thereby creating such prejudice
against 1t 10 prevent its investigation TO set
this matter AZ rest, permit me. briefly 10 dehne what
has been and Is understood to be mechanical
perpetual notion" mechanical perpetual motion
must possess selfmoylng power. begouen OF the
machine itself IL IS the Rrenl0n OF power Dy me-
chanlcal contrivances Of leverage and momentum
neither of which possesses the least particle OF the
real element OF prOpulslve force or power
Mr.. Sawyers machine is nothing OF the KIND. IL
has not particle OF power 10 originate ITS own mo-
ton 1t is subject to he continued maintenance Oh
all the necessary conditions Ii does not differ AT all
from steam engine. except IN the fact OF the great
er economy Of the elastic fluid used to propei H. ana
traction of the fluid, vacuum is employed, which
vacuum is created by force never heretofore
brought INTO mechanic n poUer HERETOFORE fhroun
a,sdU IN ererg mdchne buiH namely, Centrifugal
force We are therefore simply REINFORCED by the
discovery that there is IN Nature an efficient mechan
ical force hitherto overlooked With new elements
cannot limit our results 10y the experience OF the
past
The objection snext urged, as 1t rs frequently,
that small working model should be constructed
without waiting Tor the means to build an actual
working engine. There 50 many reasons against
this course that would be futile 10 attempt to name
them all The inventor does not need the small
model for his own satisfaction, rs he has tested by
actual experiment every principle involved, and
knows that he has the power IN question The small
model would nOt satisfy any body If built, and the
large working engine would still have TO be Tesorted
to even for the purpose Of conviction OF Just such
men as cannot now receive the principles them
selves AS demonstration.
Here we pause till called upon to report the
first experiment with the new machine. If the pub
lie have been converted to faith in the invention by
the liberal discussion III columns, very well. If
not The Tribune can longer afford space for their
Illumination.