Deseret evening news. [volume] (Great Salt Lake City [Utah]) 1867-1920, 1894-04-24
VENTILATION.


tous. with shori interval between,
During the Inhalation a ccrtni I guam.
thy OF mir IL drawn into The luntsi ami
boz the succeeding rNpulsive action
co responding qutntity % gaseous ma.
ter h thrown irOm the lunW;
but careful chemical invesliga
lion would show "a great diiicfeuc'
in mu8sition butaeUu thu air taken
in aud that tXhaled. L't ua examine
this PROCESS more IN detail. Here BE- an
excellent motel % tue human lunga,
with tue heart nesting between, llie
sIze, aud true In CJlor Ihis large pipe,
composed of fiuFs a cartilage with
connective tissue between, lcnIs from
the mouth cavity 90 the lungf; ii Il The
frGciCT or wind piuu. A. it enters the
iuuHsit divides into two main bnuChuf,
each called a br0Hchua; ihcsu divide
Into bronchial tuupa, asd these again
are Hubdlviird until tlr divisions be-
come ~ noe that the uunldeI eye fails
10 trace them. The microscope, how
ever, reveals thc fact that tho ultimate
trauches ui those tubes terminate Boo
tiny bladdrr.nGs engagements Callri
ar vcsiclea, which nrs clustered about
the tubes like punches OF grapes. A.
air IL taken into the lungs, entering
through mouth and nUstflls, thence
through tho ttachea and iis many
divisions, the air vr-Iclus become IN.
Hated. Tiny blood vessels, called from
thuir miuutuuuas c1pWrrif8 lmrnuiug
haif.likcl convey The blood o. tue tN.
terror walls VI these vesiclrs. and while
tassiug round them, tho liiu iluii b.
separated from the air only by inc cAs
,rcmrly thin walls Of the vusiclca nul
blood vessels thcmsoiyrs. 10 has al
ready teen seen that nllis tend 90
ulnuso " brought tUgothufi but
there Do another tendency, oven
more wonderful than d'uuHioui
by which fluids are caused
10 pass through separating VALE, n
these partitions be- al nll permrhnlci
this ~ toe phenpmenDn " OuHOfis, anu
through 10, tho gases collected by TIE
blood iu lta passage through the body
pass from the veins into the vcslclr
chamber, % be- subsequently expelled
rom tho luugs, while the li'ouuetaiu'
Ing oxygen uifiusea from tho vvalclu
cavity into the blood vrsspls, anu su
purifius or aofnlrs tho blood. II "a
PERSONS respiration be checked, as by
choking, or by immufsing his head In
an inert gas VI liquid, no oxygen can
enter the lungs ~ aetnle the blood, aud
" not relieved, tho pefson dies OF
sutilcnii0n; or ~ Physicians say, OF
asJ hyEia, hu has In fact been pOisUrUl
by tho foul products OF his own vital
energies. Pure dir, then, - inilHpCu.
sable TO health, ia fact u IL essential 10
lie.
9. ACCOMMODATIONS T. constantly
Ia progress, und were II not for n
c0uniehcting process " publication
the entire atmosphere would soon
become foul In u.o'ci spaces, such us
tho rooms OF dwelling n0uHua, how
ever, there " no chance Tor pufltlca.
ton Of the nir unCu bui1uluj, ami the
only possible course o. u rxprl the
mophiuc atmosphere ana replace u boy
pure ait from without. Carbon
uilXid ia abnormal quantity BE-
Que Of tho most constant in.
gradients OF contaminated aii,
aud this IL In ucuofdaucr with what
would bu very generally supposed from
the known facts that cafbuu di0xl1 o.
constant product Of animal aui
! vegetable decay, Of animal anu human
| respiration, Of ordinary combustion,
aud Of fermentation. Remembering
| the easy test afforded by lime water
becoming turhid Ia the pfefonco VI
carbon diOxid, We can readily test for
this gas. Take a goblet containing
Z some clear limo water; M Que lruathus
through this tube Into the liquid you
see the milkluoas becoming apparent.
/ You will remember In n recent lecture
on combustion the gaseous products
resulting from the burning Of n candle
were drawn through lime water with a
similar result. II tho gasca rising from
| lefmonting wort, or from decnying
/ plants be- passed Into lime water, the
/ presence Of the gas viii DO proved con.
ciusively. The amount OF carbon
| dioXiG M air has been regarded aB a
| proper Index % purity; though Il must
not ho forgotten that other contain.
/ mating substances ate formed Ia many
/ Of the processes already re'eIrel 10. AZ
alfraiy seen, the quantity OF carbon
/ uioHid ordinarily uteHunt ia pure nir
Z IA "a per cent, ufuI Parts iu thou.
/ sand. Experiment has shown that an
/ adult person IN 10 res 'ul condition Will
/ oNhnlu about % cubic foot OF this gas
| per hour. From these facts We may form
| a good conclusion reg riding the rate
/ Of contamination ffum human rrhpifa.
/ ton alone. II "a person hu shut up in a
| tight room uf Illu cubic feet capacity,
/ no would eXnalu during nm hour %
/ cubic foot OF carbon di0Xid which,
/ added 10 the amount normally present,
/ would make the quantity is cubic irut
| In the 5000 Gu. Il. ofniEor % Gu. II, per
| thousnudi and this Rmuunt-.B cubic
/ foot per thuusant-ls regarded by good
authorities ss the ma1imu a amount ca
/ be tolerated IN tho air OF dwellings IL
/ Il plain, then, that la order 90 keep tho
/ enclosed space within tho permissible
/ limits during o. second hour, the place
| OF tue 5000 ga. n. u impure MIR musI
| be- iil,oi ~ a llkgquautily Of fresh hif
/ from without Ih.s amount, 1000 GA.
/ o. per hour pur person, IL Togntdul AZ ~
! proper requirement Ia ventilation. Ez,
Ceaslyu ~ tuls may seem, there are
some reliable authorities who place tho
amount higher thus Dr. billing, shys
an adult needs one cubic foot OF putc
air por second, or 5000 Gu. a. per huut.
! Ihose foitrUuCe.s are 10 adult persons
Ia % condition Ui but moderate ACTIVITY ,
children eEhalo Ices uatbyn dioEId,
gown persons iu vigorous exefc st
would tzhnlc more than the average
amount,
take some Illustrations that have
been cited iu this class before. Al tho
rate mentioned the mir of bedroom
/ l9KliKll feet, containing 1915 cu. n. of
/ EuHup. womb bp contaminated lac tb..