The Masks They Wore During World War II
In this colorized image from 1938, a mother is walking her baby in a gas-resistant baby buggy (or pram). The pram was designed by FW Mills and was an alternative to the baby gas mask. The lid had a glass panel; there was a gas filter on the top. On the back of the pram, a bulb from a car horn sucked in fresh air and expelled the stale. Thus, the buggy was properly ventilated. The woman herself is also wearing a gas mask.
In World War I, chlorine and mustard gas were used as a form of chemical warfare, resulting in 88,000 dead and 1,200,000 injured. This was only 20 years before the start of World War II, and so it was part of the collective memory. This, coupled with the bombing of Guernica, helped to induce terror in Great Britain.