Laughing Gas (1914 film) from Motion Picture News wrote, "Besides getting into a fight with two of his master's patients and getting generally in the way, [Chaplin] doesn't do anything except create roars of laughter." Laughing Gas (1914 film) Laughing Gas is a 1914 film starring Charlie Chaplin. The film is also known as Busy Little Dentist, Down and Out, Laffing Gas, The Dentist, and Tuning His Ivories. We are told Charlie is a dental assistant. He arrives at work where the patients are already waiting. He joins the tiny second dental assistant in the back room. They have a brief squabble then Charlie
Tear gas tear gas "breaks down into cyanide oxide, phosgenes and nitrogens that are extremely dangerous". Use of tear gas in warfare (as with all other chemical weapons,) is prohibited by various international treaties that most states have signed. Police and private self-defense use is not banned in the same manner. Armed forces can legally use tear gas for drills (practicing with gas masks) and for riot control. First used in 1914, xylyl bromide was a popular tearing agent since it was easily prepared. The US Chemical Warfare Service developed tear gas grenades for use in riot control in 1919. Certain lachrymatory