MAGNETIC OBSERVATIONS 



DEFLECTIONS WITH MAGNETOMETER No. mi 



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



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



r 



TT 



Formulae : = 

 m 



L' 



JO 



H 



-+ log m (H 



255 



j 



*Mean from four sets oscillations before and after deflections : 1.43977, 1.43959, 1.43974, 

 and 1.43930. 



t See page 10. 



