From the Imperial War Museum in London, a couple of incredible photos of nurses testing out infant gas-masks: "Three nurses carry babies cocooned in baby gas respirators down the corridor of a London hospital during a gas drill. Note the carrying handle on the respirator used to carry the baby by the nurse in the foreground."
GAS DRILL AT A LONDON HOSPITAL: GAS MASKS FOR BABIES ARE TESTED, ENGLAND, 1940
(via Kadrey)