Haematoxylon. Haematoxylon campechianum. Logwood. (Central America.) N. O. Leguminosae Caesalpiniae. Tincture of the heart-wood.   Clinical.-Angina pectoris. Colic. Diarrhoea. Dysmenorrhoea. Headache. Indigestion. Ptosis. Throat, sore.   Characteristics.-Logwood is the well-known