SEVERAL years ago I described (Phil. Mag., April 1908) a discontinuity in the electric discharge in oxygen at pressures near to 0.8 mm. Namely, when a current (0.0025 amp.) was passed in a discharge ...

WHEN an electric glow discharge is passed through a tube containing air at pressures of the order of 5 cm. of mercury, the tube lying in one of the two beams in a Jamin's refractometric arrangement, ...

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Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...