Before you actually try to insert the syringe, observe in what direction the wound is likely to be extended under the skin. It will probably be upwards--almost certainly it will be so, as the waste matter, by its weight, tends to fall down. The sore at the top insertion of a muscle near the knee will send its matter down the leg, perhaps near to the ankle. Fill the syringe with warm water only, as near blood heat as you can have it. When you have got the point of the syringe even a very little way into the wound, you can inject a little water, and in doing this you will probably learn more nearly where the actual sore is to be found. The water will probably come out as fast as you send it in, but it may not come till a good quantity has gone in. Now, as you fill your syringe a second time with water at the same degree of heat, you will add a single drop of strong acetic acid, or twelve drops of white vinegar to a teacupful. You must be careful that this is not exceeded at this stage, or you will cause great pain. Moreover, you do no good to the sore by making the acid so strong as to cause suffering. If it is only just so strong as to cause a comfortable feeling of warmth, it will be all right for its curative purpose. Even very weak acid combines with the irritating waste matter that is keeping the sore diseased, and produces the desired healing effect. You have only to add one drop after another of the acid to your full teacupful of warm water, till the feeling produced by the syringing is all that could be desired. In the case of the limb that we refer to, a sensible mother used the syringe and the acid so skilfully as to heal the internal sore in a very short time, and thus the external wound quickly disappeared. Of course, if the wound is so very deep that the acid cannot be got up to cleanse it thoroughly, surgical aid should be sought.