Barrel View of Stokes Mortar
An schematic illustration of the 3 inch Stokes mortar. The mortar is made out of steel and screwed onto the ground for support by a cap. The mortar was used by the British in the trench during World War I.
Encyclopaedia Britannica (12th ed., vol. 32) (New York, NY: The Encyclopaedia Britannica Company, 1922)
Courtesy the private collection of Roy Winkelman