English: Plate V from An Atlas of Gas Poisoning by the American Red Cross and Medical Research Committee (American Red Cross, 1918).

Plate title: "Erythema of skin from general exposure to the vapour of yellow cross substance. Dermatitis of this distribution and associated with conjunctivitis forms a characteristic picture of poisoning by this vessicant." Text begins: "History of case. Exposed to 'mustard gas' at Ypres on July 12, 1917, when this substance was first employed by the enemy. Wore box respirator for only 30 minutes, so that he was exposed without any protection for nearly 4 hours. No symptoms were felt until some hours later, when severe vomiting commenced and conjunctivitis developed. ..."

The American Red Cross published this guide for the American Expeditionary Force in World War I, sometimes called the "chemists’ war." The chromolithograph plates of characteristic injuries were intended to help inexperienced officers identify the type of gas used in attacks.