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Resumen del editor
The tip of the needle is as sharp as a thorn, but it makes only a slight indentation as it touches the bulging, blue-black surface of the vein. George Hartley marvels that something as fine and sharp as that tip—created by slicing a hollow tube at a low angle—can even graze the delicate skin without piercing it. The flesh on the inside of the elbow is thin, pale, and dusted with freckles; the vein is engorged from the elastic tourniquet on the upper arm; the machined needle is precise, purposeful, and perfect in the single-mindedness with which it exists to puncture human veins and funnel blood into one pint plastic bags.