Sentence:  Becauſe by theſe the blood is thinned, and the <WSD>atrabiliary</WSD> matter reſolved. But as the diſeaſe is of the chronic kind, theſe means muſt be continued a long time. ... We have hitherto conſidered the <WSD>atrabiliary</WSD> matter as equally diſperſed throughout the circulating humours; but if its quantity be increaſed, it may ſtick in divers parts of the body, and produce the worſt kinds of obſtructions. 
Meaning of the word marked with <WSD> tags:  Of or relating to black bile.