 | Samuel Vince - 1812 - 140 pages
...heard, is about 200 miles. This was observed in the war between England and Holland, in the year 1672. The unassisted human voice has been heard from Old to New Gibraltar, a distance of 1O or 12 miles; the watch-word, Alts well, given at the latter, in a still night, having been heard... | |
 | Ireland commissioners of nat. educ - 1834 - 370 pages
...is propagated. The utmost distance at which sound has been heard is about 200 miles. It is said that the unassisted human voice has been heard from Old to New Gibraltar, a distance of about 12 miles. Dr. Derham, placing cannon at different distances, and causing them to be fired off,... | |
 | Denison Olmsted - 1835 - 374 pages
...cataracts of Orinoco, which he describes as three times greater in the night than in the day.f 655. The- distance to which sound may be heard, will of...two hundred miles. The unassisted human voice has heen heard from Old to New Gibraltar, a distance often or twelve miles, the watch word AWs Well given... | |
 | Commissioners of National Education in Ireland - 1837 - 290 pages
...is propagated. The utmost distance at which sound has been heard is about 200 miles. It is said that the unassisted human voice has been heard from Old to New Gibraltar, a distance of about 12 miles. Dr. Derhatn, placing cannon at different distances, and causing them to be fired off,... | |
 | Richard Green Parker - 1839 - 262 pages
...naval engagements have been heard two hundred ; and even the watchword "Jill's well," pronounced by the unassisted human voice, has been heard from Old to New Gibraltar, a distance of twelve miles. 453. The sound of the human voice is produced by the vibration of two delicate membranes,... | |
 | Denison Olmsted - 1842 - 384 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 GibraJtar^a distance of ten or twelve miles, the watchword All's Well given at the former place being... | |
 | Richard Green Parker - 1849 - 418 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. 167. The sound of the human voice is produced by the vibration of two delicate membranes,... | |
 | Richard Green Parker - 1850 - 408 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. 167. The sound of the human voice is produced by the vibration of two delicate membranes,... | |
 | Denison Olmsted - 1851 - 492 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...have sometimes been heard at the distance of three bund red miles; and naval engagements have been heard at the distance of two hundred miles. The unassisted... | |
 | Richard Green Parker - 1856 - 502 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 Dover. 649.... | |
| |
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... 
