OF A PENDULUM AT GREENWICH AND LONDON. 



97 



Table D. — London, July 1828. Experiments M'ith Pendulum 12. 



July 8th. Clock making 86400 Vibrations in a Mean Solar Day. Barom, 



f29.68"l 



\2!).C6/ 



29.67 



Temp. 



Times of 



Coincidence. 



Arc of 

 Vibration. 



Mean 

 Interval. 



Correction 

 for Arc. 



Reduct. 

 to 72°. 



Corrected Vibra- 

 tions in a Mean 

 Solar Day at 72°. 



1 



6 

 11 

 16 

 21 

 26 

 31 

 36 

 41 

 46 

 51 

 56 

 61 

 66 

 71 



71.7 



71.7 

 71.7 

 71.7 



71.8 

 71.9 

 72.0 

 72.1 



72.2 

 72.3 



72.4 

 72.4 

 72.4 

 72.4 

 72.4 



72.07 



h m 



9 43 



10 15 



10 48 



11 20 



11 52 



12 25 

 12 57 



1 29 



2 02 

 2 34 



31.0 

 47.5 

 05.5 

 26.5 

 48.0 

 10.0 

 32.0 

 54.5 

 16.5 

 39.5 

 02.0 

 25.0 

 47.0 

 10.0 

 32.5 



1.115 



1.1 A*.* -J 



0.915 } 

 0.775 J 



J.77.i -I 

 0.625 } 

 0.520 { 

 0.450 } 

 0.380 J 

 0.310 } 

 0.260 \ 

 0.210 \ 

 0.190 

 0.160 

 0.120 

 0.100 

 0.090 



387.45 



388.25 

 388.40 

 388.45 



+ 1.44 

 -1-0.68 

 + 0.33 

 + 0.18 



388.55 i +0.08 



388.50 ! +0.04 



i 



388.55 ! +0.02 



— 0.13 

 -0.11 



— 0.04 

 + 0.04 

 + 0.13 

 + 0.17 

 + 0.17 



85955.31 

 85955.49 

 85955.39 

 85955.38 

 85955.49 

 85955.43 

 85955.47 



85955.42 



MDCCCXXIX. 



