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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                                7<sup>o</sup>.13 Fahrenheit (the upper and lower means being
55<sup>o</sup>.75 and 62<sup>o</sup>.88). <s>[?]</s> Therefore, <s>[?]</s> of the adopted coefficient of  thermal
correction is erroneous, the result of the experiments
will be erroneous by the amount of that error on
a range of temperature of 7<sup>o</sup>.13. There may yet
be opportunity of verifying the coefficient of temperature-correction.

[Insert <sup>from</sup> on page 78
The observers were so evenly interchanged
in the upper and lower stations, that no personal peculiarity
in the method of reading the thermometers or of
taking any other observations can have produced a
sensible effect. The following table shows the
aggregate number of turns taken by each.

Initials of observer's name C D E P R S
Number of turns above       5 5 4 4 5 5
Number of turns below       5 2 5 6 5 5]
                            
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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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