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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                                of my visits, were greatly increased by the <s>[?]</s> uniform
kindness of the authorities of the mine, and by the hospitable
attentions of Robert Ingham Esq. Mr. P. John Robinson
Esq. Mayor of South Shields, James Mather
Esq, J.C. Stevenson Esq. of the Jarrow Chemical
Works, and other gentlemen resident in the town or
neighbourhood. Attendants in the mine were selected
and placed <s>at</s> under the command of the observers by the owners of the
mine.
<s>24</s>23. I may now give a brief journal of the
operations.
1854
August 5. I examined the mine, and stations were
selected.
     Instruments were procured, repaired,
     and sent to the Harton Mine; and observers
     were collected.
Sept 26. I went to South Shields.
Sept 27. I erected the clocks and pendulum at the
     upper station.
Sept 28. I erected the clocks and pendulum at the
     lower station. In the evening, four of the
     observers arrived.
Sept 29. In the morning, the remaining observers arrived.
     All were employed in adjusting the pendulums &c
     and in the practice of observations.
      
                            
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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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