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Show Scheme Devised to End Peril of Motor Fumes A recent experiment In the city laboratories of Paris la aald to have demonstrated the practicability of a catalyzer designed to consume the carbon-monoxide gas produced by motor cars which Prof. Yandell Henderson of Tale and others have asserted was a serious menace to public health In j crowded cities. The device consists of an exhaust pipe containing certain chemicals possessing pos-sessing catalysing properties which reduce the combustion temperature of tbe noxious gas. By the passage of a current of air through the tubes the fumes are consumed before they can pass out Into the street. M. Kohn Abrest, director of the laboratories, saya that the average motor car In Paris gives off one-half cubic meter of carbon-monoxide for each half gallon of gasoline burned and that a cubic meter of such gas renders six cubic meters of air unfit to breathe. In the country the half cubic meter of gas Is scattered along half a dozen miles and consequently la harmless, he says, while In Parla the automobiles move more alowly and often fill the air of narrow streets with Inhiriooa ouantltles of fn |