OF A PENDULUM AT GREENWICH AND LONDON. 



91 



Exp. 7. March 20th. Clock making 86400.07 Vibrations. Barom. 



r 29.421 

 \29.33/ 



29.375 



Times of 



Disapp. Re-app. 



Coincidence. 



Arc and 

 Correction. 



Mean 

 Interval. 



Reduct. 

 to 62°. 



Corrected Vibra- 

 tions in a Mean 

 Solar Day. 



60.7 



60.9 

 61.6 



61.5 



1 



2 

 3 



27 

 28 

 29 



39 59 

 46 34 

 53 07 

 31 17 



37 52 

 44 28 



m s 

 40 02 

 46 36 

 53 11 

 31 24 

 37 59 

 44 35 



m 

 40 

 46 

 53 

 31 

 37 

 44 



0.5-) 



5.0 y 



9.0 J 

 0.5 T 

 5.5 > 

 1.5j 



00.5- 



35.1 



09.1 



20.5" 



55., 



31. 



46 34.83 



12 37 55.83 



1.11-, ^ 



j> + 0.87 

 0.40J 



s 

 395.42 



-0.36 



85963.55 



Exp. 8. 



Fresh impulse given. Barom. < gq'gi \ 29.27 





Times of 



Disapp. Re-app 



Coincidence. 



Arc and 

 Correction. 



Mean 

 Interval. 



Reduct. 

 to 62°. 



Corrected Vibra- 

 tions in a Mean 

 Solar Day. 



61.5 



61.5 

 61.1 



61.2 



1 



2 



3 



34 



35 



36 



50 55 



57 29 

 04 01 

 28 19 

 34 54 

 41 30 



50 56 

 57 30 

 04 04 

 28 27 

 35 05 

 41 41 



50 

 57 

 04 

 28 

 34 

 41 



5.5-] 



?.5^ 



2.5j 



55.5 



29 



02 



23.0") 



59.5 > 



35.5J 



m s 

 57 29-12 



4 34 59.33 



1.12- 



0.32 



.-f-0.75 



395.46 



-0.28 



85963.55 



Table B. 



Determination of the rate of the clock by Graham at the Royal Observatory 

 Greenwich, from the 15 th to the 20th of May inclusive, and from the 

 4th to the 6th of June inclusive : by Mr. Taylor. 



"The comparison of the clock with the Greenwich transit clock was effected 

 by means of a machine constructed by Hardy for the purpose, it being capable 

 of indicating 0".05 in time ; and from the mean of 5 comparisons which was 

 always employed, it is hoped the comparisons never err 0.03 from the truth ; 

 these comparisons were made at or near the time the observations were making 

 for the rate of the transit clock, on the accurate determination of which must 

 rest the accuracy of the rate of the clock used in the experiment. 



n2 



