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In the adaptation of new procedures and techniques in medical therapy there is a tendency to abandon or overlook an occasional therapeutic aid which has proved of value in the past. The case here presented illustrates the use of such a technique which we believe is ideal in the situation under discussion.The patient was a child with thalassemia major (Mediterranian anemia, Cooley's anemia, erythroblastic anemia) in whom repeated transfusions were necessary. Eventually as a result of this and because of the age of the patient, her obesity, and the extremely low hemoglobin, together with decreased peripheral circulation, each succeeding transfusion became more and more of an ordeal, to the patient, to the parents, and to the physician, until a point was reached at which such transfusions were no longer technically possible. Superior saggital sinus transfusion might have been done, but this is not without danger and requires considerable experience

On average 36 percent of the benzo[a]pyrene in an automobile's exhaust gas comes from the benzo[a]pyrene originally in the gasoline. Between 0.1 and 0.2 percent of the benzo[a]pyrene in the gasoline survives the combustion process and is recovered from the exhaust; 5 percent accumulates in the crankcase oil. Some of the benzo[a]pyrene in the gasoline is converted into other polynuclear aromatic hydrocarbons and other more polar compounds. For our experiments we used commercial gasoline containing benzo[a]pyrene at 1.0 part per million to which was added benzo[a]pyrene-8,9-14C at 1.1 parts per million as a radioactive tracer.