New-York daily tribune., 1851-09-26
NaMYer \ Cos PerpetnnI MoIion

To NE tditOS % ne " if!DnHr
The peculiar principle upon which Mr..
Sawyer found. his proposed machine IS thisthat the
centrifugal force Of mercury reyolyed IN cylindrical
basin IS sufficient to maintain It's revolution un
impaired, and leave large surplus capable Of being
applied to any useful purpose. Mr.. Sawyer has Ger
tain numerical computations from which he processes
to derive the preceding conclusion. la siormer com
municaton ] endeayoTed 10 snow that according 10
his own data such result could only take place Al
an exceedingly high velocity and that, IA order to
avail himself Of the full extent Of thIs centrifugal
force, he must employ AIR OF ,uch density thab no
vessel could possibly resist us pressure PfeicHeu
10 argue from ms own data, II order nor 10 multiply
unnece Ssarlly the points OF difference between rs.
am wiling still 10 employ hls revised computation,
contained III Ibs Tr.5pe Of the 18th inst but must
dissent in one OF two important particulars from the
Interpretation which he puts upon them lie says
that a power of 1866 pounds evolves centrifugal
force OF 7l6 pounds There Is sense m which tnis
j. trle-but when he adds, We have clear surplus
If more lhan 1900 pounds beyond what j. required
TO turn the wheel and which may De applied to other
purposes, - ne commits an egTesous blunter As TINS
g the fundamental error of MT. Sawyer let ~ dwoll
uIon u for u moment.
In what way does loo pounds evolve centrifugal
force of 25lo pounds weight OF 100 pounds, At
tached 70 a rope which IS coied round the AXIS oi
heavy wheel at the sd ~ ten sfc0Rds has impaired 10
tn wheel very rapid rotation, and IT'S centrifugal
force i computed 10 be 2'l6 pounds. " fte sans
trtghf shOud ,0nf0p 10 at .,ile longer the cen
pounds 10000, or even greater. From tie same
weight therefore we may Obtain a centrifugal force
OF 2u1O OF 900 pounds, according 10 the t0' Ol Us
action To say therefore, that moving force =
only loo pounds conYeys no lst lced OI the total eh
peIdltTC Ci power FOR tins depends upon ilc TINE OF
is acton. 4 man who Is able 20 exert power OF
Onlg ~ pounds may. b. turning crank 0Hg sHohsh,
IMpar mellon to 4 ny-@nee! suthClenl 10 plAch a
dEge hole through = atic6 plate o. non AIIthis may
d. SAID 20 be the result OF power Of ~ pOund.-oul
s. pounds i, by 40 means the proper measure OF The
force eXQ ended. Nntors On Necf dn!cs have ie me
necessity Of Mir0 ducng "A appropriate term - de-
signate the lorce which produces these effects, and
Whlch is measured by the effect thus produced
NheWel calls 4 .0loTE- forcs and Vie INIT % Ia
borng force. which ne calls The DynGca aHt, l. the
laroi.ng force REQUISITE g. raise pound through
The height Of 90 foot II is estimated that horse
drawing q weight out Of well over pulley can
raise pogncs for gh hour, together. al the rate
of2 mile, an hour. To say that the horse only ex-
erfs a force OF 2NC pounds conveys adequate iQea
o. the result OF MS aoor Ils aborng force IS IN re-
atty 90 pounds raised " miles. or 100 ocueet WHICH
Is above Il million dynamlcai unr, pr day, O.
In OrCer now 70 edge Of the eLlcdct oi M, "a"
Vers proposed ARRANGEMENTS. We ou2hi ~ VOnips''
the laborng force expended n gylng mOtloh - s"e
machine, and also the value OF me IInx-ai -
eVOlVed,-IotA recucss 20 me sar1s saria'"y "ee's
neuf.-as for example. 20 dthaiulC4- @ M - - :.
bor,s.s,,rrr vpirb = essentially the ,afne 1AAg
That he laboring force expended ana .ha' s'oNef
IN the form of centrifugal iorfe slr ho' ~ 'ne
y, nc nrroerS 100 TO AIS has, trust, been maze
alasc-eptly evident Mr stuaIt conipu.su 'Ae az
grsgafs D.ftrer or momentum Vi LIS "i'Ius ,,o
x,b a yeocitv Of ten feet per second. 20 se o,SIV
ticb I ,ye>,,Ipcd he intended shorld represent 'le
ipr,I, orce o, the wheel. and wsce tccorningy
- N ,rrfsfut tie ia5OrIg .Osce Expended As
,n@.rgtt.,; 81 would adn.t y. Il Whe~en that tas
,rouG, Of ,-Jor1g ore > n'' .oTreAsso ~ aay