sixpenceee: The above is the hand of an early X-ray machine operator. Early radiologists would calibrate their X-ray machines by sticking their hands in the beam. They would draw lines amounting to 30 second intervals starting at their fingertips and

sixpenceee: The above is the hand of an early X-ray machine operator. Early radiologists would calibrate their X-ray machines by sticking their hands in the beam. They would draw lines amounting to 30 second intervals starting at their fingertips and

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from: https://jillthekill.tumblr.com/post/135488235810