THE investigations of McNair (Phys. Review, 31, 986; 1928) have shown the complicated behaviour of the Zeeman patterns of the mercury resonance line, 2537 A., in emission. Some observations made in ...

IN a recent paper (Proc. Roy. Soc. A, vol. 105, p. 691, 1924), one of us has given an account of a method for the production of intense magnetic fields, with the limitation, however, that the field ...

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