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If we open our school text-books on materia medica and therapeutics we shall rarely find any mention made of the qualities or therapeutic uses of solar energy. We learn the properties and supposed uses of scores of drugs and yet when we enter on practice, we find that our reliable therapeutic armamentarium is really a limited one. Water, fresh air and that most powerful agent of all, solar energy, which is supplied to us everywhere, receive only secondary consideration. The study and use ofdoi:10.1001/jama.1913.04350260027010 fatcat:b6xwsfnylvgahbaknlwuitkw6m