CONTENTSPAGEForeword3Preparation of the skin10Preparation of the hands of the operator12Preparation of the syringe15Preparation of the paraffin18Posture of patient for injection23Skin infiltration to permit of insertion of long needle without undue pain25The effect of paraffin compounds upon the tissues27The immediate after effects of the paraffin injections30The precaution used to prevent throwing of paraffin into the circulation32Factors to be considered in dealing with inguinal hernia35Where the injection should be placed39The amount of paraffin to be introduced in a given case42Technic to be used in injecting inguinal hernia44The injection of femoral hernia51Injection of umbilical hernia53Case reports59