Tetter is a transient non-contagious eruption, consisting of circumscribed red patches, upon each of which are situated clusters of vesicles, about the size of a pea. After a few days the vesicles break, pour out a thin fluid, and form brown or yellow crusts, which fall off about the tenth day, leaving the surface red and irritable. The eruption is attended with heat, tingling, fever, and restlessness, espcially at night. Ringworm is a curious form of tetter, the inflamed patches being ring-like in form.

TREATMENT. -- Light diet, and gentle laxatives. If the patient is old the tonics should be given. The elder-flower ointment is an excellent external application. The acetic tincture of lobelia is also good. Nothing better, however, can be used than the "Herbal Ointment," mentioned on page 469.