176 



EIGHTH REPORT 1838. 



Table LXXII. 



Waterford 



Cork 



Valencia 



Killarney 



Limerick 



Shannon Harbour 



Dublin 



Armagh 



Londonderry 



Markree 



Westport 



Edgeworth's Town 



52 16 

 51 54 



51 56 



52 3 



52 40 



53 14 



53 21 



54 21 



55 

 54 12 

 53 48 

 53 42 



Long. 



7 8 



8 26 

 10 17 



9 31 

 8 35 

 7 52 

 6 16 



6 39 



7 20 



8 26 



9 29 

 7 33 



Hor. Int. Total Int, 



•9493 

 •9576 

 •9517 

 •9511 

 •94.35 

 •9270 

 •9383 

 •9140 

 •8979 

 •9003 

 •9034 

 •9196 



b0205 

 1^0239 

 r0285 

 10271 

 10262 

 1-0287 

 1-0205 

 1-0296 

 10314 

 1-Q321 

 1^0345 

 r0264 



In deducing the values of L, M, N, equal weights have been 

 assigned to all the results. The following are the values ob- 

 tained for the lines of total intensity. 



L = 1-0276, M = +-0000858, N=- '0000671; 

 u=—38°(y, ?• = -000109. 



For the lines of horizontal intensity, we find 



L = -9269, M=--000138, N=— -000379; 

 '?<=:-70°0', r = -000403. 



2. Satical Method. 



Additional Observations. — The observations made according 

 to the statical method since the printing of the Irish Magnetic 

 Report, consist of my own observations in London and Dublin, 

 in the year 1836; Major Sabine's obsei-vations in Limerick, 

 Dublin, and Bangor, in the autumn of the same year ; a com- 

 parison of London and Dublin, by the same observer, in the 

 year 1838; and a series of observations, at eight distinct sta- 

 tions, made by Captain James Ross, towards the close of the 

 latter year. The details of my own observations, and of those 

 of Major Sabine, are given in the following tables. Captain 

 Ross's observations, as before, will be considered separately. 



