MAGNETIC OBSERVATIONS 



315 



DEFI,ECTIONS WITH MAGNEXOMBTER NO. IIII 



Station : Tepiitz Bay Date : March 19, 1904 Observer : R. R. T. 



Magnet No. 4 deflecting at right angles to magnet No. 2 suspended 



Formula: 5 = 

 tn 



.(1 + J4-) 



lK^-^?) 



Sin u Sin 



-; logH = j(log|+log»»(H+X)W2S5>' 



J 



»Mean from four sets oscillations before and after deflections : 1.43977. i-43959i i-43974i 

 and 1.43930- 



t See page 10, 



