During the later months of 1915, a gas mask consisting of a leather facepiece with eyepieces and a metal canister was issued to the German army. The facepiece was impregnated qith tallow and oil to make it gas-proof, the eyepieces were compound, with am outer glass lens and an inner lens of celluloid treated to prevent misting, and the canister contained layers of absorbant materials – charcoal. pumice and kieselguhr – mixed with various chemicals to filter and absorb the gases.
I’ve been drawing the masks I found in a thrft store book Gas. This is the third in a series. See them all here.