Fire Grenade 4
Fire Grenade 4 : Glass bottle filled with carbon tetrachloride or similar fire extinguishing fluid; meant to be thrown and shatter at base of fire to mix with air to produce non-combustible mixture; Similar to extinguishers made of glass fixtures with spring-loaded clapper released by heat-fusible link. Limited effectiveness, and phased out in 1950s when better extinguishers became available