, 1879-07-19
SPARKS OF SCIENCE.


SPARKS OF SCIENCE.
aUB-EARTfI VENTILATION AGAIN.
The symbols of this system OF tcmncrlng mir
md other substanccs nnd ventat!ng buildings
| AMI structures nrc s. L. '.
1t IL q modern invention, and was first intro
iluccd for general purposes In 1S74. It has
| maiulv boon used for tenpcrlng md vcntilatng
m.lk-houscs, untll within tho past two years,
during which It las been applied to dwellings,
s.nblcs, md other buildings.
Its Influences arc said to have been very Rats.
factory whenever 1t hns been dlscrcctiy applied,
In fact, the marked change in tic temperature,
dryness, and purity Of atmospheric air which
has becn passed through ahscrraucan atr.duct
tsqutte marvellous. +
| The ducts are placed at depth below the
surface of tic Garth at vhich It's temperature Is
nbout uniform ut all aeasons Of the year, and
| OIL this depends one Of The cardinal character
tsttcs OF tic un!auo System, VIZ: tho
| lnvnuahlp ono OF giving to all air
transmitted by \ S. Z, duct tho temper
aturc OF tic stratum OF earth IN which the duet
lies. 1t has brea found In the practical uso OF
this system Ia the Middle aud Northern ssates
that ut about twe}yo feet below lho surface OF
tic cart1, its Temperature Is aDout 50 degrees
| Fahrenheit pcrpctually, umt that by placing M
atr-luct at tim. depth, giving 1t proper length,
u1,d by forcing or drawing air through the coll
sluic at velocity ut which sufficient time Will
bp given for thu current of nEr, by contact with
the surface OF thu duct, td ucan!ro the precise
49,, ~ W. to'na.1, ss ~. ',.n,s,i,,, c'AA'"
Of alr may thus DC tempered and supplied.
This warming Of air at one season or time,
md cooling It at uuo,hcr, AUTOMATICALLY. md
| fro,T In nVh t1Aan
wv" VI. 'o A." .s'.a, ,'a.A.. ~,
sevus M rs ,1a .M" .a,hsom "u'
economical, uniform, and comfortaB tempasa-
tnrr thua simultaneously Unmarried ia
stmosnhcrI,. .r. ,n,t Il "a cl.ar IN
| ata'o'p"e'3S "", en Se' "
minds OF only ordinary discernmcns
tint deylco capable Of such unpro-
ccacntrd MD dcsderato results has a dcssra-
biIitT nn,l yaluc that ts quite inestinablg, but
oateristics @ which t,n: suStefranvan oir-dlrt has
i,cen f"lnI TO possess, Whenever tho air
nnsaed through d srbeurth duet cutters It at d
temperature above 50 deg. the walls and bottom
nnrtinn nj tbn vauor in tIe MIR tI,is BuiIricntIy
anhg1rattg It to we'll udnpt It to hltlnau occ,i-
na,,cy. Ths yanor so copdeused on tic suripce
- liz air..1nrI has the yery flcsrahie. ntmi. M
urnyrn Ia nractlI.. Tho reliable effect Of arrest
fnY Mi dust, rnotes OF pollen tlls air may con-
| tnin: and The cartt, has been found to possess
l a
T ,r ,r yalt,nhlo thnn ottlers ayrcaJy enumerated,
it il we'll eslpnlished That, by tl,c passago of
air through ali cart!-tluct, ind yenttlatfng wit,
| \ Weil.insuutcd building, such as
skn,fnl ,isiry.aryhtects nrs now con-
.sr'',tInp. MI liza bnn.til md ycry t,a,napnr IN.
sucnscs su' e1srtsd M n1 ur in i'm certain co15uito.
kuvwn as n,,lsEy, or a. Times Of irrqucnt aud
aIrymcn. 1, n ors entirely aycrted, and milk viii
uS uaiSta;n u'' iis ns' nprns condition rs joe as 1T
ntl,er tImus. when Il is uulcr ti.cso artistic in.
inences. i. =, It viii not acld!fy uni coaCulatu
t" 9ar. ~ ~ te sniik wIcrn it is ayaab]e: viii" In
hdo. ~ .u ,,at ' sn'nniIct wi, air iuSa,, thr"ur
m rnrth diet. and not insulated, milk viii
snur M md coarujatu at smell times 10 prccp-
@ tutolv @ ta, 80 to 10 per ccns of tic buttcr Is Lost.
hssa aressn nat,,raI cordlttons uf In, tt,,os
uhnrs yhIr tasa hs.n fo.,nI corrcctablc hy
f. W. A. ssated. l,ayo jonr a.,d aunt,ally osra.
onSa scs9 rnp tpss W Ws esr 9. etc MI
taetm.e,s T. h,a isn,,,cT ~ 'cnt ,,nnn ,iis H.
oavsr.u ""u~ condIt,o" I nf .,hS air a. hcroni
~. ,o,yor ~ nn.na, npcnrv IN Trrc"t hcnrcTt
u,,c w ~ oo,sr q; the isysnnnlent. nf acicncc
.ias ~ ,hs 49, sn,',rcrot"I ri1i GmI ~
IN y m .ou,va1rnt nf lie ureejess n,tis thnt
srinnce has s,ipuIeI in other ar,s. lm]ecd, ths
end valuable intlnsneas @ dGr'ysnle :, from D. T., Y:
saeaa't !u..s'"ao" .t,n,, N'''A' ~ - Nv
we W. are informed that preliminary arrange;
eH1e - = -. ,t ~ fs,"ra - % ,srspss,ar mi
sr y tsn 70 e :. nrr ,s NJ stc nin'.
uu ,I.., oit1r ac ~, n III ~ wh,r arts y IL
asg e,uus' ~sao es:' ~ ai,, a. "'eA 1''' N
pesvsn to pesFas ~ eecn. e,,, ,,
, ~ oeuoef' 1922 ,vi,. WarssaI III" H. y,
i, tnIt..sar Ws ,.o. a"nnii.d iii, all, M II i
nttasi ~ w. w" ~, aauue% ~ ne t',.sa nu
ycnta19" e a"a p& uaro "'m n.cs', T. D1 ,a
.ouit a,,ra uas' o .ad, c,.ras hs. ~. Nv
/. thu!t. WILL So.!e u, ~ saa i.eesn ,, nAa ,,;r H.
een a,s nes" ,r sru n, ~ Whom ,}s hisbo.t nnr