Comparisons of Magnetic Standards, 1915-21 



411 



Table 3B. Results of Horizontal-Intensity Comparisons at the Christchurch Observatory, 1915, 1916, and 1920. 



1 Values for 1915 to 1916 are referred to east pier, using the station-differences determined in November 1915, viz, 

 east pier = brass pipe + 1.3 y= jarrah peg + 5.5y; values for 1920 are referred to east pier, using the station-difference then 

 determined, viz, east pier=jarrah peg-r-3.Sy. 



' The Chiistchurch values are from the magnetograms which apply for east pier. 



Half set; weight 0.5. 



