Richmond times-dispatch. [volume] (Richmond, Va.) 1914-current, 1920-08-29
lUDY or CARBURETERI is
FOR AUTO|sT
bert Gives Complete Definition OF
What Work This Unit OF
Auto Docs.
LECTURE NO. 2O..


5 ised,
( .3seientists call the smallest particle
E which all matter: wood. iron. wa
~, air-is composed, the moiecule.
S,us drop of water is composed
millions OF molecules. as is the
lrm which is so small as no; to be
ssible under the strongest micro
sslope
1The chemis, works with these
ioicculcs. He divides them into
spat he calls atoms, and rejoins
+ lese atoms into other combinations.
aus each moleculc of water is COM
ssed OF two atoms OF hydrogen and
se of oxygen, and each inoleculc OF
s.soiine is composed OF eight atoms
e. 81 carbon ana eighteen OF hydrogen
g Whereabouts. depending upon its
s 'ade. y chemist can divide the
Il s,Soline moleculc into their elements
81 atoms. that i, carbon and ny
7ogen. and then make the caroon
Smbine with some atoms of oNy-
IN, and the hydrogen atoms with
Cher atoms Of oxygen. and so change
}Sc gasoline into what - known as
3rbon dioNidc gas. and into water.
These atoms or elements OF which
tNolecules are made are much like
slman beings. in that they like 10
Gin elements more than with others.
a Siius most elements line 10 combine
\ 9TH oxygen. while few viii readily
T,mbinc with nitrogen. Carbon and
hydrogen. Of which gasoline liz COM
1 lsed, get along well together but
{ tsie carbon would rather hc COM
med with the oxygen than wiki
re hydrogen, and the hydrogen would
$50 rather he combined with The
fsygen than with the carbon.
INF you bring number OF mole
ales OF gasoline, madS up OF atoms
As hydrogen and carbon. in contact
fSth Il number OF molecules OF oNy-
IN, they VIII. when given the slight
81 reason, separate and combine with
5#ie oxygen Heat. as from an cleo
~ that II YOU have a vessel con,
z SiDinS mixture OF gasoline and
fsysea molecules and You set Il spark
! 4 them the carbon in, the gasoline
ISL! separate from it's hydrogen and
sSTnbine with the oxygen. each atom
s. the ar1on combining with two
toms o. oxygen and thus making
{lso OF The atoms OF hydrogen viii
fombin= with one OF oxygen and
Nsake & HIP o. water.
~ When elements combine rs above.
4:le decomposition or separating and
4tcornb;nsGS Of the elements in the
y Dove Nay combustion, or We say.
Ihey burn" An explosion is an in
f5fE u.
tf From the alloy" YOU can see why
fae mixture must be In a definite
s4aiio o. oxygen or air cas- we get
{eae oxygen from the air) and gaso-
ne as for each atom OF car BON
iSaere mus: To- two atoms Of oxygen,
end FOR each two atoms OF hydro
en- one Of oxygen II there be an
xcess OF either gas or air. the eX-
gees Viii make the amour. OF hea,
ind pressure given out small. and
Itay even. by absorbing the heat from
She spars., prevent The combustion
.fptirtly.
+ Molecules made ~ Of certain ele-
-S7ents VII alwags Ssnt 20 Get away
iron pEe smother. u - &c case With
%he oxygen ana ..t'og-, ;nulecults
~ the ar Thus ~ nave q gas
tE.Ch IS ,cpss - .-lu, COPPER. wood
s.t.. MI wI-t . c-t ;ugt.a.- ana
t9sl! noic - ons another r.-y 3.-g-
~ r7'li= II so-!G mass, wale
SSzE haze : sl5r.t Attraction 10Y ~.
inotnt- &C - " .EN. iivuId
s TIE rplc--E -rr@-.-r j'cwtr g --E.
S9eSeeuteS = call-c ccnsE-t-. z-u :ha-
I'd - E,+- -Gl=4 adhesion
TIE cc'c-siyt = .--l,-1 I. =.
lss-.sJ,s,l - -.- Wa-e. syl -
;-s- .AEJ-E So wts- ..-.w-.- y
Iz.r -. ser-+-s Tt:-.--+- ~ ~
~ Z So &C. l-5 s-s,s-I. -s--.-,-
5gE--E --t ~
ssks---is-sa ----- ~ .--s---st a-.E-
.a< s--- 49, -..--- 80 ~
E 49, til -s--z---- e
=irn .--E -s = .-a..- c
l-S = -s - e.
r4Iet-= re- s-st= z-E-
r1n r. =. =
VI -&E- =. -fTs 80. 60
e---=z.-
Ts - 10y. %. -
III. szz-:. :. gas 49, Ha...
slI Lzz-g- - sex, 49, 80 ,-+s-
a.s - --z- Q: 80 a.. r.<-e ~
thS 2F-e-- = g+r 80 :+--
Z Or ,H= r-a=- rzr. Z. -re .-+sr--s
Z less -z.:- =t-.5Eaa.-, u Tz-
he ~@-S- sl.- -1-- - .'=z- e. Z
5e,9i,= r@'--= -@ss t.z- ~ Gtgts+s
+ Wa --L- q. s.s4-. .s -. ..
taso!sre arG -as Ia, t-a- ..e 2az5.
5h2 ~! enan.e . gas =; ac2-;
f*E'ets "h.-7 Is 2e'h.Ds 80 aTe--
Sigr ten oe-a --r= % me ar AID ne
Il act ,iz:. tJa - the suction stroke
.st the engine. taer. r q va-G.:a In
s"ht manifold thus making ta4 .a:..
{ lefatGs- o: Eva Iyta':Or exc: ioTe-
hAKe pos %" 70 use SasDl.ae IS
= tue! FOR -rH engine In higher
Temperature which E@rngare regt..r.s
.Ma@es !; .'nDrae'ira! w.thoI; TIE use
We wait AZ explosion Or lns.sa.s-
tteGHS cofnhuS'. on N The cylinder In
Nrdc! 20 Ecf this every rno!cEul. =,
The gas should bc In contac, or yery
Jose 10 q fuoltcUle % oxygen Thus
ne, gasoline mus: get into the o..
inder IN the form Of gas or. a.
Torst iinr fog or mist ana be
thoroughly mixed with the air 70
occoinpi!sh THIS = the purpC4- OF the
sarburctcr. Thus the definition Of q
aronrci"r is: a device for changing
'he LIQUID gasoline into gas or
fniSt, and 10 mix ii win the chr
,itct amount OF air 20 cause an in.
Btantaneuus COM ustiun or explosion
Vacuum.
j What : vacuum. ana whu, 5
fuction2 II you VIII Imagine tina,
You have drawn a squire whose s.Jcs
pre- an men. and then consider. In,
ench. you Will p!ctur. a square column
Si air reachin. nigh aOov. IN,
ei0uds; in fact. miles h!gh Now. uir
mas weight, AND tina; column vii
%eigh apoui 80 pounds a. sea level
fhus the air rs under a pressure o,
~ pounds. called the atmospheric
8ressure
a Because Of This pressure the al,
R!ti get into AN space. but il vol
rucceed in getting all Of the air on,
amply or vacuum. ana tho spac,
VII have no pressure. II -. hat
T. tank OF water and inserted int
ms trbe and then drew the al,
f%hy. there would be "a vacuum o
10 pressure in the tube. has In.
CSaicT outside y under the preSsur.
a,f the atmosphere and so some o
she water Will be forced up into IN
Cuhe. or. as We say, sucked up'
q. Having learned some OF the law
Upon which the action Of the car
Ipuretor u based, We VIII take I; III
ale1t.
Nt,rnnIro .u~ .no