Fire extinguisher in the early 60s and Purple-K being developed by the US Navy in the late 1960s. Manually applied dry agents such as graphite for class D (metal) fires had existed since WWII, but it wasn't until 1949 that Ansul introduced a pressurized extinguisher using an external CO2 cartridge to discharge the agent. Met-L-X (sodium chloride) was the first extinguisher developed in the US, with graphite, copper, and several other types being developed later. In the 1970s, Halon 1211 came over to the United States from Europe where it had been used since the late 40s or early 50s. Halon 1301
The Green Green Grass reluctant to let him in her house and is always making uncalled for comments towards him. He became more tolerant of her as the series progressed. In an "Only Fools and Horses" episode, Dora wouldn’t allow Boycie to stay with her when his gas effect log fire gases them out thus he has to stay with Del Boy. Guest actors were brought into "The Green Green Grass" on an infrequent basis however, there were a few guests stars over the thirty-two episodes of the sitcom. The first guest star was in the very first episode, "Keep on Running" which saw