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Show Numerous Deadly Vapors. Scientific instruments of precision too numerous to mention prove that there are many real material existences exist-ences strictly "of the earth earthy," among which are various gases. Yt-ur senses cannot perceive more than half a dozen of the scores of Invisible, un-smellable un-smellable and unheard-of vapors. Poison Pois-on gas of closetl garages, silos, sewers and tunnels, called carbon monoxide, Is but one of these Invisible and treacherous treach-erous enemies. |