BEING much interested in the question of the distance of propagation of the sound of the firing of big guns, I should be much obliged to any readers of NATURE who could send me some personal ...
IN NATURE of September 30 I see a letter from Dr. Henry de Varigny on the above subject. It reminds me of September 2 last year, when I noted in my diary:—“The day here (400 ft. elevation on scarp of ...
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