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65. oldal
The sounds heard in the latter room are clearly caused solely by the vibrations of the disc , which vibrations have been set up in it by the sound - waves impinging on it on the other side . The disc may in fact be regarded as the sound ...
The sounds heard in the latter room are clearly caused solely by the vibrations of the disc , which vibrations have been set up in it by the sound - waves impinging on it on the other side . The disc may in fact be regarded as the sound ...
67. oldal
For reproducing the sound at the distant station he made use of the fact , first observed by Page in 1837 , that a slight click is produced every time the circuit of an electro - magnet is made or broken . This gives rise to a note of ...
For reproducing the sound at the distant station he made use of the fact , first observed by Page in 1837 , that a slight click is produced every time the circuit of an electro - magnet is made or broken . This gives rise to a note of ...
71. oldal
The possibility of transmission of sounds through the Bell telephone is due to the wonderful sensitiveness of the ear to ... Since sound travels at about the rate of a mile in five seconds , it follows that in two seconds and a half the ...
The possibility of transmission of sounds through the Bell telephone is due to the wonderful sensitiveness of the ear to ... Since sound travels at about the rate of a mile in five seconds , it follows that in two seconds and a half the ...
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Tartalomjegyzék
PART I | 5 |
Great Britain in 1837 and 1887 By WILLIAM E A AXON 19 | 19 |
Abstracts of Important Acts of Parliament passed in 1887 | 29 |
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