Page 13 Advertisements Column 2

Otago Daily Times, Issue 20811, 2 September 1929, Page 13

mmi me numan ear I This Machine tests motor spirits for their anti-knock value The Midgley Bouncing Pin knock-testing set. This wonderful apparatus, standard equipment with motor fuel engineers for the purpose of testing the knock - resistance of motor spirits, is the only one of its kind in the Southern Hemisphere. 'PS ft * li *&< m m/mim Urn M it It records even the silent knock The Midgley Bouncing Pin knock-testing, set is recognised throughout the world by fuel engineers as the standard equipment for determining the anti-knock value of a fuel. The set illustrated above forms part of the extensive fuel-testing equipment in the laboratory of the Vacuum Oil Company Pty. Ltd. By this scientihc apparatus the remarkable anti-knock quality of Plume is regularly tested and confirmed. If motor spirit tested hi this device has a tendency to knock, the bouncing pin vyill detect it even although it be inaudible to the human ear. Even the slightest disruption or increase in the burning rate of the fuel is indicated by a telltale sign on the instrument board. There is no indication of. even a silent knock with appotenic Plume. The unequalled results achieved in this scientific test with appotenic Plume is a convincing demonstration of the appotenic story. It is a matter of scientific record that Plume does pot knock either audibly or silently. This is due to its remarkable ability to withstand the heat and compression of the combustion chamber. Prove the appotenic quality in your own car. Get the benefit of the full power output of appotenic Plume, made available through perfect knock-proof combustion. m im Perfect knock-proof combustion follows naturally when appotenic Plume is used. ** appotenic \Jrom Latin: ad (ap) meaning added to: and potens, meaning powerfut] possessing increased power; said of a gas that, being stable to heat and high compression will therefore neither audibly nor silently "knock" in a high compression engine. PIXME appotenic Motor Spirit appotenic Plume is pure, uniform, crystal-clear. Your eye can see how pure it is ... Let your car prove its power. VACUUM OIL COMPANY PTY. LTD.