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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                                observations of galvanic signals. The whole number
of <s>signals</s> efficient signals observed at each station
was 2454 (or 4908 <s>[?]</s> observations of
signals in all). It will be sufficient to give here
the mean of each group (which, from the check
described above, is extremely certain), and
the calculations founded on these means.
It will be remarked that the pendulums of
the clocks were altered <s>between</s> at the times of
interchanging the detached pendulums: that is,
between Swings 26 and 27, between 52 and 53,
and between 67 and 68.
                            
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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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