The document discusses the Calabar bean, also known as the Ordeal bean of Calabar. It is native to West Africa and contains the alkaloid physostigmine (eserine), which causes pupil constriction. The document provides details on extracting a tincture from the bean and its general actions, including motor paralysis and irritating spinal cord fibers. It also lists diseases where physostigmine may be indicated such as tetanus, post-diphtheritic paralysis, and eye muscle spasms. Key symptoms from provings include tremors, muscle twisting, horror of cold water, and sensitivity to changes in weather.