Report of the Kew Committee. 113 



Vibration Observations for Absolute Measure of Horizontal Force. 



Month. 



G. M. T. 



Tempe- 

 rature. 



Time of 



one 



Vibration. 



Log aaX. 



Mean. 



Value of 



1874 

 October . . . 



November 



December 



1875 

 January... 



February 



March ... 



April 



May 



June 



July 



August ... 



September, 



d h m 



21 11 48 a.m. 



2 51 p.m. 

 27 11 47 a.m. 



2 44 p.m. 



22 12 26 p.m. 



3 20 „ 



26 11 



12 



24 1 



4 

 22 12 



2 

 26 11 



2 



1 



3 

 11 



3 

 11 



3 

 18 11 



3 

 21 11 



24 



28 



20 a.m. 

 50 p.m. 



20 p.m. 

 18 „ 

 24 p.m. 

 50 „ 

 46 a.m. 

 45 p.m. 



P.M. 



8 ;, 



48 a.m. 

 14 p.m. 



59 A.M. 



13 p.m. 

 29 A.M. 



17 p.m. 

 12 a.m. 



21 P.M. 



57-8 

 59-2 

 33-8 

 39-6 

 30-8 

 320 



41-2 

 45-0 

 36-9 

 48-6 

 507 

 51-8 

 60-8 

 68-5 

 71-7 

 71-5 

 68-0 

 73-7 

 730 

 75-8 

 73-9 

 77-5 

 64-4 

 692 



sees. 

 4-6185 

 4-6191 

 4-6098 

 4-6125 

 4-6156 

 4-6148 



4-6131 

 4-6130 

 4-6081 

 4-6173 

 4-6250 

 4-6194 

 4-6261 

 4-6189 

 4-6276 

 4-6253 

 4-6291 

 4-6281 

 4-6283 

 4-6305 

 4-6293 

 4-6293 

 4-6280 

 4-6275 



0-31512 

 0-31527 

 0-31438 



0-31548 

 0-31553 

 0-31427 

 0-31577 

 0-31540 

 0-31480 

 0-31485 

 0-31488 

 0-31465 



0-53188 

 0-53243 

 53140 



0-53227 

 0-53183 

 0-53096 

 0-53230 

 0-53186 

 0-53154 

 0-53170 

 0-53111 

 0-53139 



\V. 



W. 



Dip observations. 



Magnetic Intensity. 



(Metrical measures in old-faced 



figures.) 



Month. 



a. m. t. 



ft 



Dip. 



© 



GO 



o 



X, or 



Horizontal 

 Force. 



Y, or 



Vertical 

 Force. 



Total 

 Force. 



1874. 

 October... 



November 



December 



d h m 



22 2 27 p.m. 



2 30 „ 



23 2 28 „ 



3 3 „ 



Mean 



1 



2 

 .1 



2 



67 50-00 

 47-46 

 50-06 



48-87 



w. 

 p. 



p. 

 w. 



w. 



3-8843 

 1-7910 



3-8815 

 17897 



3-8811 

 1-7895 



9-5269 



4"39*7 



9-5275 

 4-3930 



9-5065 



4*3833 



10-2881 

 47437 



10-2880 



47436 



10-2881 

 47438 



67 49-10 



67 49-24 

 49-68 

 51-44 



49-84 



23 2 35 p.m. 



2 36 „ 

 26 2 34 „ 



2 31 „ 



Mean 



1 



2 

 1 



2 



67 50-05 



23 2 40 p.m. 

 2 40 „ 



24 2 40 „ 



2 38 „ 



Mean 



1 



2 

 1 

 2 



67 53-00 



48-34 

 52-06 



47-78 



67 50-30 







YOL. XXIV. 



