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Reports on Special Researches 



r.4 higher at U than at L), and O7 for horizontal intensity and O'.O for inclination. Owing 

 to the method of observation adopted, the station corrections do not enter except for 

 the L observations on September 19-21, when magnetograph values referred to the lower 

 pier had to be used, the values originally supplied referring to the upper pier. 



The same azimuth mark (Kennery lighthouse) is used at both U and L, the azimuth 

 being the same, viz, 137 53'.4 W. of S. 



Table 3 A. RcsuUs of Magnetic Observations at the Alihaq Ohservalnry, March 22-2/) and September 19-21, 1911. 



[The magnetograph values are derived from the magnetograph ordinates standardized by observations of declination 

 and horizontal intensity with Coolce magnetometer No. 7 and by observations of inclination with Cambridge dip circle 

 No. 160.1 



'Only second half of full set; the first half had to be omitted, as direct rays of the Sun fell upon the instrument, making 

 temperature corrections uncertain. 



Table 3B. Residts of Declination Comparisons at the Alibag Observatory, 1911. 



