Photograph showing two gas masks in 1915, (above); a cotton-wool pad of April 1915 and (below); Hypo Helmet gas-mask of November. The first use of poison gas on the Western Front was on 22 April 1915, by the Germans at Ypres, against Canadian and French colonial troops. The initial response was to equip troops with cotton mouth pads called the Black Veil Respirator. Dr. Cluny MacPherson of The Royal Newfoundland Regiment brought the idea of a mask made of chemical absorbing fabric which fitted over the entire head, this was developed into the British Hypo Helmet of June 1915. Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/photograph-showing-two-gas-masks-in-1915-above-a-cotton-wool-pad-of-april-1915-and-below-hypo-helmet-gas-mask-of-november-the-first-use-of-poison-gas-on-the-western-front-was-on-22-april-1915-by-the-germans-at-ypres-against-canadian-and-french-colonial-troops-the-initial-response-was-to-equip-troops-with-cotton-mouth-pads-called-the-black-veil-respirator-dr-cluny-macpherson-of-the-royal-newfoundland-regiment-brought-the-idea-of-a-mask-made-of-chemical-absorbing-fabric-which-fitted-over-the-entire-head-this-was-developed-into-the-british-hypo-helmet-of-june-1915-image501356989.html
RM2M3JNXN–Photograph showing two gas masks in 1915, (above); a cotton-wool pad of April 1915 and (below); Hypo Helmet gas-mask of November. The first use of poison gas on the Western Front was on 22 April 1915, by the Germans at Ypres, against Canadian and French colonial troops. The initial response was to equip troops with cotton mouth pads called the Black Veil Respirator. Dr. Cluny MacPherson of The Royal Newfoundland Regiment brought the idea of a mask made of chemical absorbing fabric which fitted over the entire head, this was developed into the British Hypo Helmet of June 1915.