 | Denison Olmsted - 1858 - 468 pages
...great cataracts of Oronoco, which he describes as three times greater in the night than in the day. The distance to which sound may be heard, will of...unassisted human voice has been heard from Old to New Gibralter, a distance of ten or twelve miles, the watchword All's Well given at the former place being... | |
 | Richard Green Parker - 1861 - 488 pages
...; naval engagements have been heard two hundred; and even the watchword "All's well," pronounced by the unassisted human voice, has been heard from Old to New Gibraltar, a distance of twelve miles. It is said that the cannon fired at the battle of Waterloo were heard at Dovgr. 649.... | |
 | Denison Olmsted - 1854 - 470 pages
...great cataracts of Oronoco, which he describes as three times greater in the night than in the day. The distance to which sound may be heard, will of...unassisted human voice has been heard from Old to New Gibralter, a distance of ten or twelve miles, the watchword All's Well given at the former place being... | |
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The distance to which sound may be heard, will of course vary with its force and various other circumstances which are incapable of being reduced to an exact law. Volcanoes, in South America, have sometimes been heard at the distance of three hundred... 
