226 Report of the Kew Committee. 



Table II. 



Observations for the Absolute Measurement of Horizontal Force. 



Month. 



-r m 



L °g V 



mean. 



Log vtiK. 

 mean. 



Yalue of m*. 



1886. 









November 4th 



9-12210 



• 30890 



0-51820 



29th 



9-12069 



-30786 



0-51794 



December 31st 



9-12105 



-30767 



0-51804 



1887. 











9 '12141 



0-30785 



0-51836 





9 -12077 



0-30799 



0-51806 



March 28th 



9-12078 



0-30799 



-51806 



April 25th 



9-12060 



0-30816 



-51806 



May 31st 



9 -12063 



0-30835 



0-51819 



June 29th and 30th 



9 • 12080 



-30824 



-51823 



July 29th 



9-12061 



0-30«15 



0-51806 



August 30th and 31st 



9-12052 



-30766 



0-51771 





9 -12003 



0-30803 



0-51764 



Table III. — Solar Diurnal Range of the Kew Declination as derived 

 graphically from selected quiescent days. 



Hour. 



Summer 



Winter 



Annual 



mean. 



mean. 



mean. 



1S87. 









Midnight 



-o'-9 



-l'-6 



-1-3 



X 



-l-o 



-1-3 



-1-2 



2 



-1-4 



-1*3 



-1-4 



3 



-1-8 



-1-4 



-1-6 



4 



-2-2 



-1-3 



-1-8 



5 



-3-0 



-1-2 



-21 



6 



-4-2 



- 1-4 



-2-8 



7 



-4-8 



-2-0 



-3-4 



8 



-4-4 



-23 



-3 4 



9 



-3 3 



-23 



-2-8 



10 



-0-4 



-0-9 



-0-7 



11 



+ 3-7 



+ 1-4 



+ 2-6 



Noon 



+ 6-3 



+ 3-4 



+ 4-9 



13 



+ 6-4 



+ 3-9 



+ 51 



14 



+ 5-8 



+ 3-3 



+ 4-6 



15 



+ 4-1 



+ 2-1 



+ 31 



16 



+ 2-2 



+ 1-1 



+ 1-6 



17 



+ 1-0 



+ 0-4 



+ 0-7 



18 



+ 0-2 



+ 03 



+ 0-3 



19 



o-o 



+ o-i 



o-o 



20 



-0-2 



-tO 3 



-0-3 



21 



-0-3 



-0-8 



-0-6 



22 



-0-5 



-1-4 



-1-0 



23 



-0-8 



-1-5 



-1-2 



* m = magnetic moment of vibrating magnet. 



