These may be made of the mustard powder alone, or in combination with
bread crumbs, or linseed meal. When mustard only is used, the powder
should be moistened with water, and the paste thus produced spread on
a piece of linen, and covered with muslin to intervene between the
mustard and the skin. When mixed with linseed the powder and the meal
may be incorporated before water is added, or the meal may be
moistened and spread on linen for application, and the mustard be then
strewn on the surface, more or less thickly according to the age of
the patient. Rigollot's Mustard leaves, which can be procured from any
chemist, are now much used in the place of mustard poultices. They
only require wetting before application, and are both clean and
economical.