Abstract
IN a paper on “The Genesis of Pleochroic Haloes” (Phil. Trans. R.S., vol. ccxvii.) by J. Joly, a theory is advanced accounting for certain structural features of the halo on the assumption that, reversal of the. halo-image is possible, and may take place under conditions defined in the paper. In support of this a drawing of a halo is given in which an evident inversion or change from positive to negative has occurred, the inner region being light, the outer dark.
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JOLY, J., POOLE, J. Reversed Pleochroic Haloes. Nature 104, 92–93 (1919). https://doi.org/10.1038/104092c0
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DOI: https://doi.org/10.1038/104092c0
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