 ... arises from the fact that the signal often appears to be surrounded by a belt, varying in radius from one to one and a half miles, from which the sound appears to be entirely absent. Thus, in moving directly from a station, the sound is audible for...  Soundpor John Tyndall - 1905 - 480 páginasVista de fragmentos - Acerca de este libro
 | Royal Society (Great Britain) - 1883 - 540 páginas
...audible for the distance of a mile, is then lost for about the same distance, after which it is ag-nin distinctly heard for a long time. This action is common to all ear• For nn illustration of the former class see plate facing page 170 of "The \VorKl's Foundations."... | |
 | Smithsonian Institution - 1883 - 818 páginas
...in moving directly from a station, the sound is audible for the distance of a mile, is then lost for about the same distance, after which it is again distinctly...signal is situated on a bare rock twenty miles from the main land, with no surrounding objects to affect the sound." Prof. Henry, in considering the results... | |
 | United States. Congress. Senate - 1874 - 1218 páginas
...from a station, the sound may umcTnnd thin be audible for the distance of a mile, is then lost for about the same distance, after which it is again distinctly...heard for a long time. This action is common to all ear-sij.'twK and has been at times observed at all the stations, at one of which the signal is situated... | |
 | Philosophical Society of Washington (Washington, D.C.) - 1874 - 640 páginas
...in moving directly from a station the sound is audible for the distance of a mile, is then lost for about the same distance, after which it is again distinctly heard for a long time." Again, in a series of experiments at which Sir Frederic Arrow and Captain Webb, of the Trinity Board,... | |
 | 1875 - 806 páginas
...in moving directly from a station the sound is audible for the distance of a mile, is then lost for about the same distance, after which it is again distinctly heard for 1 That is to say, homogeneous air with an opposing wind is frequently more favorable to sound thun... | |
 | Spencer Fullerton Baird - 1876 - 1888 páginas
...moving directly from the station, the sound is audible for the distance of a mile, is then lost for about the same distance, after which it is again distinctly...heard for a long time. This action is common to all sound signals, and has been at times observed at all the stations; even at one where the signal is... | |
 | Smithsonian Institution. Board of Regents - 1879 - 590 páginas
...in moving directly from a station, the sound is audible for the distance of a mile, is then lost for about the same distance, after which it is again distinctly heard for a long time. This action is common to ail ear-signals, and has been at times observed at all the stations, at one of which the signal is... | |
 | Joseph Henry - 1879 - 120 páginas
...in moving directly from a station the sound is audible for the distance of a mile, is then lost for about the same distance, after which it is again distinctly heard for a long time." Again, in a series of experiments at which Sir Frederick Arrow and Captain Webb, of the Trinity Board,... | |
 | Smithsonian Institution. Board of Regents - 1879 - 588 páginas
...in moving directly from a station the sound is audible for the distance of a mile, is then lost for about the same distance, after which it is Again distinctly heard for a long time." Again, in a series of experiments at which Sir Frederick Arrow and Captain Webb, of the Trinity Board,... | |
 | Philosophical Society of Washington (Washington, D.C.) - 1881 - 902 páginas
...in moving directly from a station, the sound is audible for the distance of a mile, is then lost for about the same distance, after which it is again distinctly...signal is situated on a bare rock twenty miles from the main land, with no surrounding objects to nffect the sound." Prof. Henry, in considering the results... | |
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