Letter | Published:

Spectrum of Doubly Ionised Iodine

Nature volume 135, page 269 (16 February 1935) | Download Citation



WORK on the identification of the lines belonging to this spectrum was begun more than four years ago and a preliminary announcement on a clue obtained which was expected to lead to an analysis of the spectrum was made at the time in these columns1. That clue, however, did not lead to the expected result, and had to be abandoned. Finally, it was realised that the only way of solution, though necessarily a very lengthy and tedious one, was to find all possible differences between the wave-numbers ascribed to this spectrum.

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  1. 1.

    NATURE, 127, 165; 1931.

  2. 2.

    Z. Phys., 60, 20; 1930.

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  1. Physics Laboratory, Government College, Lahore. Dec. 24.

    • J. B. SETH


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