During the two world wars people got to know the gas mask, the device that was born in the horror of World War One and often turned the world into a grotesque place.
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A soldier tries out a gas mask whilst peeling onions at Camp Kearny, San Diego, California, USA, during World War One, circa March 1918. This image is from the files of the United States National Archives. Please credit. (Photo by Popperfoto/Getty Images)
Kitchen staff at the Grosvenor House Hotel, at work during a fifteen-minute gas mask drill, Mayfair, London, circa 1940. (Photo by Keystone/Hulton Archive/Getty Images)
A couple kissing under the mistletoe, wearing gas masks. (Photo by Fox Photos/Getty Images)