Account of pendulum experiments undertaken in the Harton Colliery, for the purpose of determining the mean density of the earth, by G. B. Airy
to the end of 118: Mr. Dunkin from the beginning of 119 to the beginning of 121' and Mr. Ellis from the end of 121 to the end of 122. Mr. Ellis observed 8 from the end of 117 to the end of 122, about 2 hours after midnight. This terminated the Eighth Series, and the whole operation. Section X. Comparisons of Clocks. The following table contains the mean of each group of comparisons; and the computation of the Log Rate of Shelton upon Earnshaw. 69. The clocks were compared by means of a Solar Chronometer sometimes three times and sometimes four times at each interruption of Swings. When there are three comparisons, all are made by one observer: when there four they are usually (but not in every case) made by two observers. The <s>[?]</s> discordance of the different comparisons in each group does not exceed 0<sup>s</sup>.01 or 0<sup>s</sup>.02.
Please login to transcribe
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
Please login to comment