Abstract
I BEG to offer my thanks to Mr. Knobel for his obliging Correction (vol. ix. p. 396) with regard to the contrasted tint of the snow-poles of Mars. His observations had quite escaped my recollection.
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WEBB, T. Mars. Nature 9, 463 (1874). https://doi.org/10.1038/009463b0
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DOI: https://doi.org/10.1038/009463b0
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