Report of the Kevj Observatory Committee. 369 



APPENDIX III.— Table I. 



Register of principal Seismograph. Disturbances. 1899. 



AT • 



JN 0. m 

 Kew 

 register. 



Date. 



Commence- 

 ment 



Duration 

 of P.T.'s.=*^ 



1st 

 maximum. 



2nd 

 maximum. 



Amplitude 

 in 



seconds of 

 arc. 



Total 

 duration 

 of disturb- 

 ance. 









li. m. 



m. 



h. m. 



li. m. 





h. m. 



49 



Jan. 



14 



2 58-2 



27 -2 



3 26-5 



3 28-2 



1-03 



1 11-5 



50 



>) 



22 



8 22 -2 



5-6 



8 29-1 







0-77 



27-5 



52 



„ 24-25 



23 47 -7 



43-4 



35-6 



42-6 



2-44 



2 59 -6 



89 



April 



12 



17 47-2 



29 -6 



18 35 -1 





0-46 



1 44-6 



112 



June 



5 



15 15-4 



30 



15 46 -2 



15 55-2 



0-58 



1 11-6 



114 



)> 



14 



11 28-6 



22-5 



11 52-0 



11 59-1 



1-90 



2 9-4 



124 



July 



12 



1 55-3 



10-8 



2 12-3 



2 13-3 



1-12 



1 40 



125 



>j 



14 



13 31-4 



21-9 



13 54-0 



13 56-8 



1-60 



3 35-6 



142 



Sept. 

 }> 



4 



33 -6 



8-3 



1 3-0 



1 7-3 



7-49 



2 49-2 



144 



10 



17 15 -3 



7-3 



17 50-1 



17 53-5 



2-18 



exceeded 



1 39-0 



145 



55 



10 



21 1-6 



58 -9 



22 20-21 



22 25 -6 



10-80 



3 0-0 



149 



55 



20 



2 16-7 



4-6 



2 21-8 



2 27-5 



3-20 



1 22-8 



150 



23 



11 23-3 



20-2 



11 46-7 



11 49 -8 



0-70 



1 19-2 



151 



55 



23 



14 1 -8 



19-0 



14 24-3 



14 26 -3 



0-70 



1 12-4 



152 



55 



Not. 



29 



17 23 -2 



5-3 



17 35-5 



17 45 -7 



0-51 



2 13-8 



168 



23 



10 1-0 



9-8 



10 10-8 



10 11 -8 



1-04 



1 4-5 



169 



55 



24 



19 5-5 



19-1 



19 41 -4 



19 43-4 



0-69 



59-5 



179 



Dec. 



31 



10 59-2 . 



8-9 



11 13-7 





0-88 



53-3 



180 





31 



20 37 -1 



18 -7 



20 58-2 



21 2-7 



0-50 



57-7 



* P.T.'s = preliminary tremors. The times recorded are Gr.M.T. ; midnight = or 24 hours. 

 The figures given above are obtained from the photographic records of a Milne Horizontal 

 Pendulum; they represent E — W displacements. 



