for an hour or more without resorting to thoracotomy. It is probable that lowering the head increases the blood flow to the brain. The continued in¬ terest of the electric utility com¬ panies has been of great importance in stimulating this work. With the ex¬ pansion of the use of electric energy more and more problems will arise. The work reported here is an excel¬ lent example of the value of multiple disciplines such as engineering and medicine working in close coopera¬ tion.