An exceedingly interesting account of the developments of blind flying. It seems that the human animal is quite helpless in an aeroplane if he follows his own instinctive tendencies and is without ability to correct them by visual perception of world landmarks. If he is above the clouds or in a storm where he cannot see, his instincts seem invariably to lead him astray. He therefore has to learn to fly by the instruments on the dash-board. This is not so easy as he must be prepared to do the things that instinctively he would not. Blind flying has been developed to the point where the pilot takes off, makes the flight, and returns entirely as a result of the guidance by the instruments.

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