PLATE NO. VIII Brown staining from mustard gas.

This purplish-brown, or brown, or brownish-black tint usually appears in areas that were first inflamed and red, but it may arise without such preceding erythema. Its distribution is in the same areas as those in which erythema occurs, that is over the exposed skin surfaces of the neck and hands, or on the sheltered moist flexures of the body. It may appear at any time from the fifth or sixth day onwards, and it persists for several weeks, until the stained cuticle desquamates. There is no deep pigmentation.

The drawing was made from a case on the eighteenth day after exposure to gas, and the brown tint was present on the sixth day.

Plate VIII.