“…Hamilton3 notes the danger of carbon tetrachloride as a fire extinguisher in the presence of heat in a closed space, under which conditions phosgene is generated. The New York Titmes, July 7,1932, reported a fire in a New York subway in which "Pyrene" fire extinguishers were used and 150 persons were overcome with the fumes, which were probably a mixture of carbon tetrachloride, phosgene, and chlorine. The Journal of the American Mledical Association,4 in an editorial on the subject, states that in Portsmouth Navy Yard in 1919 two men died from the fumes produced when the clothing of one caught fire and Pyrene was used to extinguish the flames.…”