Add to ORKGIn the previous paper the author reported the production of anti-mucoid precipitin in the anti-sera of rabbits, obtained by injection with urinemucoid which was obtained from cancerous or inflammatory subjects and adsorbed with aluminum hydroxide. It was also noted that there were serological differences among the mucoids, according to their sources, i.e. cancer, inflammation, and normal. The present paper deals with extractions of urinemucoid from patients with tuberculous pleurisy ; from each of the patients two extractions were made according to the results of serum polarographic filtrate reaction : first when the filtrate test was positive, and second when the disease was cured and the test turned negative. Serological studies on...