John Haldane was a scientist who tested deadly chemicals on himself in his home in 1915, in the race to develop the gas mask.

World War One (WWI), ... German artillery soldiers wearing gas masks pose with a quick-firing anti-aircraft gun used mainly against low-flying airplanes. Blowing in the wind ...

CHEYENNE, Wyo. (AP) — A World War I gas mask stolen from the Wyoming Capitol and missing for almost a century is on display in Cheyenne again after a South Dakota pawn shop donated it back to ...

Each of the French soldiers in the Argonne now has a felt mask that fits over the nose and mouth, and in the crevices of this mask is a whitish powder which neutralizes the German gas, thought to ...

(The German army would remain majority horse-drawn through World War II.) Between 1916 and 1918, gas hospitalized 2,200 horses and killed 211, mostly because logistical uses limiting their ...

Slide 1 of 4, Soldiers wearing gas masks during World War One, Poisonous gas was used as a weapon The First World War was the first-time poison gas was used on a large scale during war.