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 their places, and interrupted the washing of
the pumps; and our lower station was soon flooded
by the size of the water. And thus for the second
time our attempts were defeated.
9. Many years passed on before sufficient leisure or sufficient motive for again trying the
experiment presented <s>to ourselves</s> itself to me. The only
<s>important</s> great improvement in the application of the
pendulum to the <s>[?]</s> measure of priority
was Bessel's discovery, reduced to a practical
form (as regarded the English construction of the
pendulum) by Colonel Sabine, of the necessity of an
increased correction for the pendulum's buoyancy
in the atmosphere. I had, however, opportunities
of <s>witnessing</s> observing the difficulties inherent in the Cavendish
experiment, from witnessing the repetition of that
experiment by my late friend Mr.F. Baily.
At length, in the year 1854, a new power
was placed in my hands. The galvanic system was
                            
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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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