There are still various kinds of injections to be considered.

Intra-articular injection, which is now considered somewhat antiquated, is used in obstinate cases of hydrarthrosis, generally with tincture of iodine diluted with an equal or double quantity of distilled water, in order to check serous effusion. After a few minutes the excess of fluid is allowed to run out, the wound is covered with a cross of adhesive plaster, and the patient is kept in bed until the acute synovitis which follows is over. Absorption often takes place without, though probably with greater certainty with, massage.

The more uncommon parenchymatous injections are performed in the following way. Two or three Pravat syringes filled with a 2 per cent. solution of carbolic acid are daily injected into the capsule itself, or into its immediate neighbourhood, in order to promote absorption during chronic, or after recent, inflammation. Schuller has seen good results from this treatment, especially in cases of shrinking of the capsule and contraction after simple joint inflammations. If this treatment is employed at the same time as massage treatment, which, as far as I know, has never happened, it should be so arranged that injections are made for a few days and massage given for the next few days (proper attention being paid to the wound), and so on alternately as long as is necessary.