, 1879-07-08
remedy implied. m e1otius OF tenan,ry riyaling
in expedition that oi the 1srnnltes from, totl1-
n{se. \ TENANT.


S$h0~T&aEku FN1LkWEt0Hs
IT, tn Eaitnr At The Tribune,
Cn1cAno, July Tin Tho general application
Of this comparatively now systcm Of ,empering
air, alsl vcntllnang h,ildtnrr4 which has bccn
jpanguratcd oi Into, sornc vcry remarkable
facts laso bccn developed, nj, explanathI, Of
With would greatly obls4c all slso arc using
The s5stcn,, whether ia low or high latltadcs.
for the a,sne tuuxp1tcablc results have ohtalnsd
in both
The Inventor and pa.unsee Of this systcn, (aa
symbus for which be tscs s. Il. W, as well as
his severn! verr Intelligent neents, ia constantly
engaged in supplying It for vartcty Of p,,r.
poscs, ai,d thcy atc aiI experimenting with dif-
fcrcut modes ana appliances for supplying and
exl,anst,ng air. Careful liote Is made ot the
results attained, anlo1IE which are two that are
even norc remarkable than ti.c wantlcsslh po-
,ency the tl,!Acarth ulr-dtct has foN
purifying t,,r atmosphere. The mysterious, utl-
explained results Ri1utcil To are tl1fse: 1T the
careful use Of the hygr0meter, It has heot found
tAt air, when tnken into s.ibtcrrnne;sl aT.tiast
proportion nf It hy tl,e vapor balng condemned
on The kurfarc Of the duct tllat the wet hulb nt
tho Instrument placed Mt the discharge end
will regittcr 4 10 dcI. +. lower than the dry
bulb, Tins furnishing paeltive psuof that nir Is
nphrtlrnted, as well as rt'olcd md warmed, by
passing It through duct laid In a stratum pt
Garth known to have temperature Of nbolt 50
dcH.
It aa ntso bcon reliably asccrtatncd that nj,
a'r-dast laid as certain uerth, and ot proptr
length, Will discharge DIR nt nearly, the sai1,o
temperature ns TINT of the earth Il, which It
Hes. It matters not whether the MIR enters at
10 ttcg. 10 l0 Acr. ahove, or zero to 80 tfcg. lc-
low, It Ia discharged iron, duct a. nbout tlc
Temperature Of the enrth+ ar about 90 deg.
1t has ulso repeaiedtY occurred Tint atr ati,nt-
ted to the duct Ut say Gla to TO-, OF at 0O etp
llDe, Is delivered tn tho building Or apartment
at about the same temperature. md In tllc same
ingre4s shaft OF ll,r duct IN saturated or IN an
.nnhydruus condition. Tic atmosphere in MI
buildings snh~tarth ventilated Ii always founl 10
he what is called "dry," though testt made
which will describe conelusive|y sow thAs it Is
by placing tin vcsaet filled with tco an,l salt
in the discharge ur,d Of eubenrth air-!urt tEie
exterior Of tile vessel soon lleeamc cuycrcd With
heavy coating Of frost. The frss fs, OF course,
the congcalcd vnpor remaining III atr truss1'tt-
ted l,y tho sub-carti duct, and proves that tlse
air Is not thoroughly dried In passlnE through
tho duet; yct It Is 50 tlry that plain shect4rou
pipes forming the discharges OF air from suo-
earth duct nre not rlstcd. even when they have
been Ii constant use for years. and under all
rondttJons OF the external atmosphere.
1t Is also found th.t air fully saturated, rs vol
Us uIat IN d very dry condition, whan It enters
thu ingrcss shaft Of sub-carth a[r*duSt, Is dc.
lvercl to tho building In the same condition az
to llo.tt temperature nnd dryncaH.
II IL also found that ducts Of proper length
nnsl lcpth inarveousy tuantaln their potet,cy
for both cooling air transmitted by them dur
iEE protracted heated turns, ut,l warming It for
iiRe period Ut vcry cold weather.
Now thvra must be Brought to bear on the
walis of tht duct. un.l on the surrounding earth.
some coinpensatIng Influence not generally an-
dssstood Thu. 50 ope1atMss rs that ysryEdryana very
into the building of about the same tci1pcr1i-