178 



EIGHTH REPORT 1838. 



Table LXXIV. 



Major Sabine's Observations, Needle S 2. 



Correction of the Results. — The only correction which seems 

 necessary in the results already recorded is that due to the ef- 

 fect of temperature upon the needle S 2, the temperature-cor- 

 rection of that needle having been obtained by Major Sabine 

 subsequently to the publication of the Irish Magnetic Report. 

 This correction is small, the coefficient in the logarithmic for- 

 mula being only -000024*. The corrected results are given in 

 Table LXXV. 



As the expression of the uitensity deduced by the statical 



method is a function of the dip, as well as of the inclination of 



the needle when loaded, it may be necessary to show that the 



changes in the dip-corrections of the needles (page 104 and seq.) 



• Sixth Report, p. 108. I 



