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A measurement of the proton gyromagnetic ratio in water by the low-field method is in progress. The Earth's magnetic field is compensated down to 1 nT at the center of Helmholtz coils in the constructed nonmagnetic facilities. The solenoid former of fused silica has been fabricated by the screw grinding and lapping within the dimensional variations of a few micrometers.>
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Kim et al. (1995) studied this question.
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