XXIV 



INTRODUCTION. 



Chronometer, ARNOLD & DENT, No. 1253, slow of mean Greenwich time 13?w. 50s.57, and 

 losing daily Os. 61. During the first series of vibrations the temperature of the magnet was 

 76, and during the last 77. 



Experiments of vibration with weiyld. 



Calculation of the value 1 



86400 



; x= 05.61. 



86400* log 4.9365137 



Os.61 log 9.7853298 



.0000071 = 4.8488161 



a a' 



Calculation of the values - 



Without weights. 



a=r.00896; eS=41.0; # = 24.5 



a 2 log 0.0077480 



d log ; . 1.6127840 



d' log '.. . . 1.3891660 



.000072722 2 log . . 



.0000054 

 1 log 1.0000070 



^ =1.0000016 



1.7233316 

 = 4.7330296 



With weights. 



a=l'.00896; d= 116.0; #=85.5 



a 2 log 0.0077480 



d log 2.0644580 



d' log 1.9319661 



. 000072722 2 . 1.7233316 



1 



86400 

 a a' 

 "16" 



.00005339 

 1.00000706 



= 9.99905367 



= 5.7275037 



