Hogwatch #18: Animation of fuel injection?.Hogwatch #17: Chemist pouring gasoline on wad of cotton, then shows how the vapor will roll downhill to an ignited candle.Hogwatch #16: Instructional video about "burning / oxidation" showing hot coals being stirred in large oven and a beaker used to snuff out a candle.Hogwatch #12: Mechanic working on engine. Hogwatch #9: Man building a house that falls down.Hogwatch #8: Lumberjack cutting down a tree.
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