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