Account of pendulum experiments undertaken in the Harton Colliery, for the purpose of determining the mean density of the earth, by G. B. Airy

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                                subject. When other elements of calculation are
examined, as the general simplicity in the form of the
ground for the mine-experiment and the complexity
for the mountain-experiment, the accurate knowledge
of the geology for the mine-experiment and the obscurity
for the mountain-experiment, the difference became
still more striking in favour of the mine-experiment as
compared with that <s>on</s> of Schehallien.
4. In a subsequent section, means will be given
for enabling the reader to judge whether an accuracy
like 0.1 vibrations per day in the difference of the rates
of pendulums above and below, in the mine-experiment,
has really been obtained. Methods will also be
indicated for completing the corrections depending on the
irregularities of the earth's surface. I [ad..t?] to these
at present only to have the opportunity of explaining
that the form of computation exhibited alone is not <s>final,</s>
final, but is merely intended for a preliminary
                            
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Manuscript details

Author
George Biddell Airy
Reference
PT/54/5
Series
PT
Date
1855
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Account of pendulum experiments undertaken in the Harton Colliery, for the purpose of determining the mean density of the earth, by G. B. Airy, 1855. From The Royal Society, PT/54/5

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