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4. was found to be mainly derived from the white cells. It has a distinct anticoagulant activity compared with its colorimetric value thus having an A/C ratio of 40. The corresponding values for beef heparin and chondroitin sulphate are 100 and 0-4 respectively. It has an electrophoretic motility on filter paper higher than that of chondroitin sulphate; its complex with Azure A has a metachromatic colour having a maximum absorption at 580 jig;isolated A. P. S, The
5. S.) fut isole et identified au moyen de l'electrophorese sur papier A filtre de 4 c.c. de sang provenant de cas de rhumatisme articulaire aigu et d'arthrite rhumatismale. On le decela aussi dans un certain nombre d'autres maladies et sa presence fut particulierement marquee dans un cas de vieux diabete. Dans le sang normal on n'en trouva pas de quantities appreciables;polysaccharide acide (A. P, Un