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April 11, 1896


JAMA. 1896;XXVI(15):735-736. doi:10.1001/jama.1896.02430670037008

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The African explorer Henry M. Stanley, in Science, comments upon the experience of Bonvalot and other mountain climbers in respect of the perception of distance:

"I do not know that the attention of psychologists has been sufficiently called to the experience of mountain climbers as bearing on the problem of the perception of distance. Both Sir Martin Conway in his recent book, 'The Alps from End to End,' and M. Bonvalot, in his book, 'Across-Across Thibet,' have some suggestive remarks of the same general tenor on this subject, but I will quote only those of M. Bonvalot, as they seem on the whole the most pertinent. Speaking of the highlands of Thibet, he says:

"'It is difficult to imagine how hard it is to find one's way among these highlands, where a man loses all sense of perspective, his eye wandering over immense spaces without seeing, at given distances either

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