IN reply to the letter of Mr. L. P. Muirhead in NATURE of June 23 (p. 175), I would ask to be permitted to state that the after-glows are very rich and conspicuous here evening after evening, and occasionally discernible till 10 p.m.
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BOZWARD, J. After-Glows. Nature 36, 245 (1887). https://doi.org/10.1038/036245b0
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