The thermometer became the icon of the nurse as the stethoscope was to the doctor. In this illustration, a male nurse reads a thermometer in a French military hospital during the First World War (1914-1918). The horrific casualties of this conflict surpassed anything previously experienced and nursing became a major field of war work. Chromolithograph after Pierre Abadie-Landel (fl. 1916-1937), Paris 1916.