At California's Stanford University last week Biologist Dietrich Bodenstein displayed a winged insect which was half immature pupa, half mature butterfly. This monster was a by-product of Dr. Bodenstein's discovery of the agency which causes the final metamorphosis from pupa to adult. It is a growth substance generated in the head which reaches the tissues through the skin. It may be a hormone, but since hormones have not previously been found in insects it may also be an enzyme or some sort of nerve stimulus.
Dr. Bodenstein cut off the circulation of...
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