Medicine: Pure Hormone

The growth-promoting substance that made Alice in Wonderland's Alice shoot up through the treetops has been discovered at last. Drs. Herbert McLean Evans and Choh Hao Li of the University of California announced in last week's Science that they have isolated a few milligrams of it in pure form¬ónot enough to practice on little girls with, but enough to practice on rats.

The substance is a protein with a huge, complex molecule of a type known as a euglobulin. It is called pure pituitary growth hormone. From two pounds of the front part of...

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