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Page 216
THE SOUND OF BIG GUNS . 6 For a century at least , it has been known that the sound of gun - firing may be heard to great distances . The conditions , especially the direction of the wind at the time , must be favourable ; but , granted ...
THE SOUND OF BIG GUNS . 6 For a century at least , it has been known that the sound of gun - firing may be heard to great distances . The conditions , especially the direction of the wind at the time , must be favourable ; but , granted ...
Page 222
It is not , at this distance , a definite sound so much as a jarring and throbbing of the air . ' From the above instances , which might be extended almost indefinitely , it is clear that the wind is an important factor in the ...
It is not , at this distance , a definite sound so much as a jarring and throbbing of the air . ' From the above instances , which might be extended almost indefinitely , it is clear that the wind is an important factor in the ...
Page 224
Thus , the comparative inaudibility of sound - vibrations in the direction from which the wind comes is due not so much to any enfeeblement in the vibrations as to their being lifted over the heads of observers on the surface of the ...
Thus , the comparative inaudibility of sound - vibrations in the direction from which the wind comes is due not so much to any enfeeblement in the vibrations as to their being lifted over the heads of observers on the surface of the ...
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