ctly drained as above indicated, I made an opening directly into the joint at the outer and posterior part, one inch long, through which I could introduce the probe between the ends of the femur and tibia, without any difficulty, through all parts of the joint. However, I discovered no necrosed bone by so doing. Put a tent into this opening, and let the one above heal up, which it did in about two weeks. This latter opening into the joint I kept open by means of tents until the joint became anchilosed and ceased to discharge pus. The patient made a slow and steady recovery, and about the middle of April was able to get out doors again.
The special points of interest in this case seem to be the obscure and insidious mode of attack; the slow progress of the inflammation, it being rather sub-acute than acute; and the fact of its being a sequela of pneumonia.
Prof. Gross, in his excellent work on surgery, says, "synovitis, in the great majority of cases, arises from the effects of rheumatism, gout,
