Page 18 Advertisements Column 1

Dominion, Volume 22, Issue 130, 26 February 1929, Page 18

| OuiCK | | | Cork frowst! s == ! 4 S I REOVIREf / M>Tf Wli \ f I NO N i 1 <ORMCREW 1 I /O®LJ = * /K. A. jyyx'T’C.iijrC*^? — =s I | I EH “D.C.L.” Whisky is now S | supplied in bottles fitted g i MB with a new Cork Stopper ~ I jLMII a t * S as easy t 0 remove 8 e as ie ass stopper s I jHggnk a ecan^er * = I = ll"''?*s^K flr? '® thot 1” ly ° b ’ s' E IS < w z m! Jii tamable before the war. == ,g I HCE I I (GOJL&JLAISEL) = | SCOTCH WHISKY |

A MESSAGE OE VITAL INTEREST TO MOTORISTS , r ■ ’ • ' ' ' ' \'r.‘ .. appotenie- : ap'pd-ten" ik ) The quality in a motor spirit that ensures perfect Combustion! In previous announcements the reasons for adding this word “appotenie” to the motorist’s vocabulary have been outlined. Here, we discuss the question of Combustion. As a motor owner, the knowledge of how ideal combustion is attained will prove of vital interest to you. ij _JL-' * * appotenie [from \k \ /ll TTF Latin: ad (ap), meaning g* p TT ■ added to; and potens, H I Bi , meaning powerful] pos- w Ik sessing increased power; toid of a gas that, being gj X X“7/ I Stable to heat and high s compression will there_f ore ne ‘^ ler audibly nor II I 11 silently “knock” in a compression engine. | | J jSS3 ■imu iiiir-M irw—f fe»ESB?3ssiKnzijaEa RMTro MMIR HER 111 Ml W This diagram shoius This diagram shows correct combustion — incorrect combustion—ivith ‘Plume with motor spirit unstable the appotenie motor spirit to heat and high compression Plume, defying high temperatures, powerfully When you use a motor spirit that is unstable resisting the disrupting influences of high com- under heat and hi g h compression, a chemical . ( ' ... .tm change takes place in the charge shortly after the pressions, burns evenly and steadily. The expan- • r • • • nr* 6 j 1 r instant of ignition. The temperature and pressure sion of the gas following this correctly-timed of the ignited portion “A” raises the temperature combustion delivers a powerful, thrusting push to pressure in the remainder of the charge to • f j e suc h an extent that it spontaneously ignites, or the piston. It maintains this steady surge of power “goes off,” in uncontrolled combustion, throughout the length of the power stroke, Flames rip through the charge, hitting cylinder T enabling your engine to deliver its full horse- walls and piston, resulting in what is commonly power. Correct combustion follows naturally called a knock. Whether this knock is silent ... t • or audibly, the propulsive power of the charge is when appotenie motor spirit is used. Plume will wasted in violent, spasmodic expansion, which the deliver maximum power without silent or audible piston cannot absorb. “knock,” despite the stress of hill climbing in Retarding the spark, or cutting down to second, top gear or the heavy-load strain of low gear may cut out the sound of the knock, but it is sunply a case of shutting the stable door after the ‘plugging” through sand or mud. horse-power’s gone. The quality of crudes differs widely. Some crudes produce motor spirits unstable to heat and compression. These will spontaneously ignite at lower temperatures than Plume—the motor spirit distilled from the appotenie crude. Plume—appotenie, heat- £ ° . resistant —will withstand temperatures in a combustion chamber which would cause inferior motor spirits to “knock”—either 'SC audibly or silently. Our next announcement will explain the significance of the “silent knock" / 'Safeguard yourself! Fill up at the Plume pump! VACUUM OIL COMPANY PTY. ltd. No. 3 of a Series.