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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                                [Table of Comparison A not transcribed]

[Table of Comparison B not transcribed]

When it is considered that <s>the</s> corrections for temperature
have already been applied, founded on the best
materials to which at present we have access, it will
be perceived that the <s>the</s> two "Means of the two lines" are
almost strictly independent of temperature. Now we have,
in the Harton Experiment, other means of determining the
relation between the pendulums. In article 45,

     Log Rate Pendulum 8 below/Rate Pendulum 1821 above = 9.99928558

     Log Rate Pendulum 1821 below/Rate Pendulum 8 above = 0.00073694

Subtracting the first from the second, and dividing by 2, the
effect of the mine is eliminated, and that of the temperature
is sensibly eliminated; and we obtain,
                            
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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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