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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                                from the representations of W. Sheepshanks,<sup>*</sup>, on
occasion of the experiments of 1828.

<s>43</s>42. In the First and Second Series, n = <s>28</s>26, and
the successive weights are 26, 50, 72, 92, 110, 126, 140,
152, 162, 170, 176, 180, 182, 182, 180,...... 50, 26. In
the Third and Fourth Series, n = 15, and the successive
weights are 15, 28, 39, 48, 55, 60, 63, 64, 63,.....15.
Combining the separate results by these weights, we
obtain the following mean results.

First Series
Log Rate of Pendulum 8 below upon Pendulum 1821 above.
     = 9.99928536

Second Series
Log Rate of Pendulum 1821 below upon Pendulum 8 above
     = 0.000732691

Third Series
Log Rate of Pendulum 8 below upon Pendulum 1821 above
     =9,99928584

Fourth Series
Log Rate of Pendulum 1821 below upon Pendulum 8 above
     = 0.00073715
______________________________________
* Since I commenced drawing up this paper, my valued friend has
been snatched away by death: a victim, I believe, to his labours
 gratuitously undertaken for the formation of the National Standard
                            
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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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