The Earth And Its Mechanism Being An Account of the Various Proofs of the Rota
The Earth And Its Mechanism Being An Account of the Various Proofs of the Rota
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The duration of the oscillation in the meridian may serve to determine the time of the earth's rotation.
9. Comparing the squares of the numbers of the oscil- lations which take place respectively in the horizontal plane and in the meridian, during equal intervals, and with the same velocity of rotation, their ratio will give the cosine of the latitude of the place of observation. Hence, supposing an instrument to be accurately constructed on the principles laid down by the theory, an observer ...could determine by it, without seeing the heavens, the direction in which the stars seem to revolve, and the duration of the revolution, which would afford a most convincing proof of the earth's diurnal motion.
We cannot conclude this chapter without laying before the reader an objection to the primary hypothesis made by Mr. Foucault, with regard to his gyroscope, viz. That its only connection with the earth is through its centre of gravity. This cannot be exactly true, for neglecting even the torsion of the thread by which the ring is suspended, the friction of the pivots is sufficient to communicate the earth's motion to the gyrating body.
What to read after The Earth And Its Mechanism Being An Account of the Various Proofs of the Rota?
You can find similar books in the "Read Also" column, or choose other free books by Henry De Worms Pirbright to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The duration of the oscillation in the meridian may serve to determine the time of the earth's rotation.
9. Comparing the squares of the numbers of the oscil- lations which take place respectively in the horizontal plane and in the meridian, during equal intervals, and with the same velocity of rotation, their ratio will give the cosine of the latitude of the place of observation. Hence, supposing an instrument to be accurately constructed on the principles laid down by the theory, an observer ...could determine by it, without seeing the heavens, the direction in which the stars seem to revolve, and the duration of the revolution, which would afford a most convincing proof of the earth's diurnal motion.
We cannot conclude this chapter without laying before the reader an objection to the primary hypothesis made by Mr. Foucault, with regard to his gyroscope, viz. That its only connection with the earth is through its centre of gravity. This cannot be exactly true, for neglecting even the torsion of the thread by which the ring is suspended, the friction of the pivots is sufficient to communicate the earth's motion to the gyrating body.
What to read after The Earth And Its Mechanism Being An Account of the Various Proofs of the Rota?
You can find similar books in the "Read Also" column, or choose other free books by Henry De Worms Pirbright to read onlineMoreLess
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