MAGNETIC SURVEY OF JAPAN FOR THE EPOCH 1895.0. 127 



naturally continuous as the magnetic elements in those tables 

 are expressed by different formulœ fur different districts of that 

 -country. The full lines are continuous, thc^y are calculated from 

 the quadratic expressions, 



X = 1 6346.0 - 109! 60 J/ - 40.3.'0:] Jc + 0.'639 J/- - •2.040 J/ Jcr + 9.'683 J^- 

 + .5.9 ±1.45 ±2.10 ±0.6.54 ± 1.693 ±1.128 



Y= .5869.9 + 128.17 J/- 39"29J^ + 0.'ll6J/-+ Ù'mJ/J<p-?jA4*jJif' 

 ±.5.1 ±1.2.5 ±1.82 +0..56(; ± 1.46.5 ±0.977 



Z = - 4489.5!3 - 108.20 j;. - 408^99 Jy^ + o!9.50 J/r'~ 10.'l42 J/ Jç^ + 4.027 Jtj- 

 + 6.4 +1.56 +2.26 +0.704 + 1.823 +1.215 



J/=(/-4° W.)°: Jçr = ((^-.53° N.)° 



-derived from the values at the 9 so called Central Stations given 

 in Tables I, IV and VII in the same volume. Table XIX 

 gives the observed and calculated values of these elements. 



TABLE XIX. 



Rectangular ConiiionentH oi' ^Magnetic Fi)rce in (Ireat Britain. 



