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The excerpt represents the core issue or deciding factor on which you must meditate, and is drawn from Journey to the Center of the Earth by Jules Verne: It was my uncle's own voice! He was talking to the guide. And
'_forlorad_' is a Danish word.
Then I understood it all. To make myself heard, I must speak along
this wall, which would conduct the sound of my voice just as wire
conducts electricity.
But there was no time to lose. If my companions moved but a few steps
away, the acoustic phenomenon would cease. I therefore approached the
wall, and pronounced these words as clearly as possible:
"Uncle Liedenbrock!"
I waited with the deepest anxiety. Sound does not travel with great
velocity. Even increased density air has no effect upon its rate of
Journey to the Center of the Earth | 
