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THE clinical value of the urinary specific gravity is unchallenged by the thousands who routinely perform it as part of every urinalysis. The claim that it differentiates transudate from exudate in ...

Read in the Section on Medicine of the American Medical Association at the Fifty-eighth Annual Session, held at Atlantic City, June, 1907.

Quantum mechanical methods can now be used to study gravity. Scientists in Austria have developed a new measurement method that allows them to test the fundamental theories of physics. Quantum ...

Perception of gravity is essential for animals: most animals possess specific sense organs to detect the direction of the gravitational force. Little is known, however, about the molecular and neural ...