Quarterly Journal of Science: 1870, Volumen7John Churchill and Sons, 1870 |
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Página 5
... occurs when the prongs are oblique in reference to the ear , and the waves generated by each prong exactly interfere . If the interference be only partial , beats , or intervals of sound and silence , will be produced . Returning now to ...
... occurs when the prongs are oblique in reference to the ear , and the waves generated by each prong exactly interfere . If the interference be only partial , beats , or intervals of sound and silence , will be produced . Returning now to ...
Página 9
... occur at the higher limit ? It is perfectly conceivable , nay likely , that many insects produce and hear sounds far ... occurs . The retention of light upon the retina amounts to th of a second . This retention causes a luminous point ...
... occur at the higher limit ? It is perfectly conceivable , nay likely , that many insects produce and hear sounds far ... occurs . The retention of light upon the retina amounts to th of a second . This retention causes a luminous point ...
Página 10
... occurs in gaseous media . Humboldt , when journeying upon the plains of the Orinoco , noticed that columns of alternately hot and cold air enfeebled the passage of sound just as they lessened the passage of light . In the same way ...
... occurs in gaseous media . Humboldt , when journeying upon the plains of the Orinoco , noticed that columns of alternately hot and cold air enfeebled the passage of sound just as they lessened the passage of light . In the same way ...
Página 11
... occurring at the upper surface of the water . * With curved reflectors sound is affected in the same way as light . A sound - focus or a sound - image may be obtained by a con- cave reflector . The following lecture illustration of this ...
... occurring at the upper surface of the water . * With curved reflectors sound is affected in the same way as light . A sound - focus or a sound - image may be obtained by a con- cave reflector . The following lecture illustration of this ...
Página 16
... occur at once . Every one knows that the juxtaposition of two colours nearly alike is bad , and it is well known that two adjacent notes of the scale sounded together produce discord . Selecting and sounding together two different notes ...
... occur at once . Every one knows that the juxtaposition of two colours nearly alike is bad , and it is well known that two adjacent notes of the scale sounded together produce discord . Selecting and sounding together two different notes ...
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