MAP 3. 



Jour. So, Coll. Vol. XIV. PI. XC. 



LINES OF EQUAL HORIZONTAL INTENSITY (H) FOR 1895,0 



Ihducnl from Oburvatitms at -Jil Stations by the Method of Least Squares 



DISTURBANCES OF HORIZONTAL INTENSITY, 



)■ ur 0.1)0001 C. a. S. Units. 



Bed Fujjires mdieate that the Uofizontal Intensity is Greater than the Caleulated Value. 

 Blue Figures „ „ „ „ .. „ Less 



H„„.=29401.38-1.2494W-1387-6.0409(j!-37-y 



+ n.n009713(A-138-y'-0.000366C(,l-138-y(iJ-a7')' -0.001203% -3 ) 



,-^^' 



4 





r Atemur """"^fif«!* "V"^ ^^ 





•.-^.,„ 



