Reductions to Standard Instruments 13 



Table 4. Inclination Corrections on Adopted International Magnetic Standard for the Period 1914-1920 Continued. 



For explanation of types, see p. 6. 



These corrections, determined from comparisons with circle 226, apply after Oct. 1917, when a new pivot was made for needle 1 and the 

 pivots of the other needles were trued up. Government Astronomer Dodwell states that, prior to these repairs, comparison in March 1916 of 

 needle 1 only with circle 226 showed practical agreement of observed inclinations; there being no other comparison data, the corrections prior to 

 Oct. 1917 were adopted as zero, since correction of circle 226 is small. 





