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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                                Section VI. Computation of Log. Rate of Lower Pendulum upon
     Upper Pendulum, combination of individual results;
     and conclusion on the <s>[?]</s> proportion of gravity
     at the Lower Station to gravity at the Upper Station.

<s>40</s>38. The quantity now to be found is Log. Rate of Lower Pendulum/Rate of Upper Pendulum.
This is = Log [Rate of Lower Pendulum/Rate of Earnshaw] + Log [Rate of Earnshaw/Rate of Shelton] - Log [Rate of Upper Pendulum/Rate of Shelton].
The first of these quantities is given, for every Swing, in Section V: the
second in Section II: and the third in Section IV. Thus the following
numbers are formed.

First Series. Log Rate of Pendulum 8 below on Pendulum 1821 above

[Table not transcribed]

Second Series. Log Rate of Pendulum 1821 below on Pendulum 8 above

[Table not transcribed]
                            
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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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