New-York daily tribune. [volume] (New-York [N.Y.]) 1842-1866, 1851-09-12

1000 But We must allow for some .oSs by friction,
Therefore velocity No. : insufficient cealril-
q force u 1910 requires an expenditure OF lI,-4o
Nox. tbs 5 the power required 70 be cxerted d.
rsc:v Oh The circIm,Ttr, 81 the whce! m order 10
evolve -hs gwen ali luni @. cenudlgl iJtce. b.;
Nj Sawyer proposes "a sTp.y ne pressure tpun o
SYral groove IL consequence 81 "h.1h, a-c'fAn- 30
the &c FnQrf.tiCrs ct Prot bn4 me r'luiIcH io"fr
mus. De N ere, >sd nearly thTce-ot MAKING - tNt'N
N,lc.-.v y g the. eiorc. = laSull .icaL Let rs
then examine velocity Nc. I. lhl> fctc'ltF COZ
spends to ise niy revolutions oi me "heel pNt '
\ON ne WaCt ot raliTCA1 tlr - .ItAt> iH VI .-i'
ter. ard making twenty revolutions per SCUM
woulc trav,l Al = RTE erresi ana 1aHtrtG FiitS Pr
hour. Il viii readily Be perceived thai Ne are gee
urc INTO The reighbOrhCod OF fc.ocles "h'A AIe
somewhat formidable
We must now attend - another CONSIDERATION.
The mercury was supposed 20 De l0rcei up tAe 'Io'
uy The pressure OF the atmosphere But the pte>>tt
OF the atmosphere i only equal 20 niteCn poi1> te
square inch and The amount q surface upon Val "
this pressure = available. THE END 90 tat tuo'i -
only inches. that the entire ANAlaolc pressure
Of the atmosphere only amounts 10 l5o pouna>. ne
enormous centrifugal force developed ov me rotA-
ton OF the mercury must. therefore, remain Almost
wholly unavailable, unless We can create cores
poncug artificial pressure. THIS Mir SAWYER pro
poses 10 DO and lnaSmuch Is with a ceniriilsa.
force 81 2,1l6 pounds he requires the same amount
of pressure on riches of surface. he proposes o
surround the apparatus BY a close CHAMBER. ana
pump IN ar until the pressure % the surface 81 the
quicksilver amounts 10 81 pounds 10 ne inch. some
OF the hgh-pre>sure boats The Western waters
carry OF lsU pounds pressure which frequently
results IN explosions. Mr SAWYER appears 10 appre-
bend no danger from go pounds. But We have "a
ready seen that centrifugal force OF 2.o pounds IS
no, equal TO the power required 70 keep the ma hne
VI 10 the corresponding velocity, and thar The same
was true OF yeloclues Nos and 3, and we proposed
10 examine velocity No. 4, corresponding e. cen
,rifugal force OF l73>2i pounds. Now 70 make ihl>
entire force available. Nj SAWYER according 70 me
reasoning INST stated must pump ar INTO the an chlm
Der until The pressure on the surface OF me quick
silver 7.3s2 pounds to the inch II the boilers 81
Western steamboats, explode With A pressure ot IN
pounds 20 the inch. where NIL Mr. sawyer md a
vessel which VIII withstand i9,ooo pounds 10 the
inch
trust have succeeded IN showing that. accord
ing to their own data, the PROJECT of sawyer co.
i perfectly visionary / could give other reasons
plenty IS blachberues but lei this suffice. The
preceding objection may De summed up aS follows
According TO SAWYER & Cos own data. t3e repirfn-
1i frrs \ rrons ieei errsfaS re potrcr required
20 yroduct ne rotation only 40 egcsednsg Rg7 rfor
ttS-gHd ~ ordsr ~ ardA f1t7SIrsS Of the f sr'enf
of his centrifugal force tie must employ ar ~ S7
dqstg that no resSsi coud possibly rssis rs r'Ssrr
ELIAS LOoNi>.
Ns,r- York i'HIrsrSlfu, NfDf. :. 1851.