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Electric Trepanning Machine

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Pacific Press Publishing Association · Mountain View, California · Jul 22, 1913

FromSigns of the Times, Vol. 40, No. 28.

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Electric Trepanning Machine

A surgeon in Chicago has invented a machine for cutting the skull so that a patient can be trepanned by this method in a fraction of the time required by the old chisel and hand-worked saw. The machine is something like a miniature buzz-saw, operated with an electric motor. Dr. Emil G. Hoglund is the inventor.