Hoang-Nan. Strychnos gaultheriana, Pierre. (Tonquin). N. O. Loganiaceae. Tincture of dried bark.   Clinical.-Albuminuria. Boils. Carbuncles. Eczema, pustular. Hydrophobia. Leprosy. Paralysis. Prurigo. Syphilis. Ulcers.   Characteristics.-Hoang-nan is a plant indigenous