Page 15 Advertisements Column 1

Evening Post, Volume CVII, Issue 51, 4 March 1929, Page 15

1 IT was by careful experimenting and testing that the makers of Peroxide Tooth Paste discovered exactly the blend of ingredients that gives this Tooth Paste such unique qualities. It definitely fights dental decay. Its whitening powers are amazing. It will remove all traces of tobacco stain from youT teeth. In addition, it j^ 00""^^ leaves the mouth feeling delight' <^britism \k fully fragrant and refreshed, by I we . Jj^w its clean healthy taste. An \^j£/fl^ all British made product at a moderate price. : 9d. & 1/6, ) 1 From all Chemists. y/ M ACLE A N S J C " - TOOTH _ " Y\S~ P^STE ~) % New Zealand Distributor*: R. F. TOLLANDS &. CO., LTD., Wellington.

A MESSAGE OF VITAL .INTEREST* TO MOTORISTS V appotenic** {tfyoriounced/ : ap' po-ten" ik ) The quality in a motor spirit that ensures perfect Combustion! In previous announcements the reasons for adding this word "appotenic" 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. ' appotenic [from This diagram shows - This diagram shows correct combustion— incorrect combustion— with 'Plume with motor spirit Unstable the appotenic motor'spirit to heat and high compression Plume, defying high temperatures, powerfully When you use a motor spirit that is unstable relisting the disrupting influences of high com- under heat and high compression, a chemical , , , ... _„ change takes place in the charge shortly after the prewns, burns evenly and steadily. The expan- .^ rf The temp€ J ature J d preMUre sion of the gas following this correctly-timed o f the ignited portion "A" raises the temperature combustion delivers a powerful, thrusting push to md pressure in the remainder of the charge to „ , , such an extent that it spontaneously ignites, or the piston. It maintains this steady surge of power « goes m uncontfO , lccl com bustion. throughout the length of the power stroke, Flames rip through the charge, hitting cylinder enabling your engine to deliver its full horse- wa^ m& piston, resulting in what is commonly power. Correct combustion follows naturally ""^J^" Wh«ther this "^ k" « sile».t r ' or audible, the propulsive power of the charge is when appotenic 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, , , i .__ . r i may cut out *« «>und of the knock, but it is top gear or the heavy-load strain of low gear simply 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 ■»"£ «!^iC!l**^' Wto* motor spirits unstable to heat and compression. These will spon- KS^^^^^^J^fyi, taneously ignite at lower temperatures than Plume —the motor J^^^^^^^^ *£. spirit distilled from the appotenic crude. Plume—appotenic, heat- °^^S»^Se resistant —will withstand temperatures in a combustion chamber iKnkf YTILf nvH&h which would cause inferior motor spirits to "knock" —either fflwFJjUJ*]m laf audibly or silently. ivß^t &&Z< ml Our next announcement will explain the significance of the "silent knock." 'vlfc^jißr'? S?^* Safeguard yourself! Fill up at the Plume pump! >A VACUUM OIL COMPANY P™ L"n>. . No. 3 of a Series: