Mow, a counter-irritant used especially in of gout, rheumatism, and nervous dis-orders. It is of Japanese invention, having been in use in that country many centuries. The tenn is derived from the Japanese mogusa, "burning herb or grass." The liner woolly parts of the young leaves of wormwood, a species of artemisla, are applied to the skin in the form of small cones, and set on lire by means of a magnifying glass. They burn very slowly, and leave a sear or blister, which afterward breaks and discharges. The operation is not a rely painful, except when it is applied twice in the same place. The Japanese have elaborate treatises on the art of moxa burning, according to the part to which it is applied. Its use in Japan is almost universal, and nearly every person, especially among the lower classes, is scarred with moxa spots, burned on the back, to relieve pleurisy, asthma, and indigestion; on the legs for rheumatism and to strengthen the feet; on the arms to relieve sure or weak eyes. It is used occasionally in the practice of western physicians.