=Treatment.= Continuous irrigation has long been recommended. It is worthy of trial, but in the majority of cases occurring in current practice it cannot be carried out. Moussu prefers a form of treatment which he claims has always succeeded in horses and oxen—viz., irrigation of the parts, followed by injection of sublimate glycerine solution. He first washes out the infected synovial cavity with boiled water cooled to 100° Fahr. A counter-opening may become necessary, and the washing should be continued until the escaping water appears perfectly clear. Immediately after each such irrigation he injects from 7 to 14 drams of glycerine containing 1 part in 1,000 of corrosive sublimate. He repeats this treatment daily. By reason of its affinity for water and for the liquids in the tissues or suppurating cavities into which it is injected, the glycerine penetrates in all directions, reaching the finest ramifications of the synovial sacs, a fact which explains its superiority over aqueous antiseptic solutions. Suppuration is rapidly checked and repair becomes regular. The pain and lameness progressively diminish, and recovery may be complete. It is advisable to assist this internal antiseptic treatment by external stimulants and by the use of a blister. Solutions of greater strength than 1 part of sublimate to 500 of glycerine are only required during the first few days of treatment and until suppuration diminishes. Later, they prove irritant, and interfere with healing. TRAUMATIC ARTICULAR SYNOVITIS—TRAUMATIC ARTHRITIS—“OPEN ARTHRITIS.” [Illustration: $1] It has been described above how primary inflammation of the articular synovial membrane produced by a wound may rapidly develop into suppurating arthritis. =Symptoms.= The pain is very marked at the moment when the accident occurs, but this pain, due to the mechanical injury inflicted, diminishes or completely disappears after some hours. Soon, however, synovial discharge sets in, announcing the onset of traumatic synovitis. At first limpid, it soon becomes turbid, then curdled, and finally grumous, purulent and greyish in colour. Pain then returns, rapidly becomes intense, continuous and lancinating. It produces lameness, sometimes so severe that no weight whatever can be borne on the limb. A diffuse, œdematous, warm and extremely sensitive swelling then rapidly develops around the whole of the injured joint. General disturbance, with fever and loss of appetite, appears, indicating a very alarming condition. It is sometimes a little difficult to differentiate between this condition and that due to injury of a tendon sheath, but as a rule diagnosis is easy. =Prognosis= is very grave. Life is threatened, and wasting occurs very rapidly. Infection of the synovial membrane is soon followed by necrosis and erosion of the articular cartilages, as well as by softening and inflammatory change in the ligaments, etc. [Illustration: $1]