208 



REPORT ON 



The following are the equations of condition, formed in the manner just explained, 

 for the Admiralty Standard Compass. 



From these equations of condition, the following normal equations have been 

 obtained by the method of least squares. 



Solving, we find 



g = -f 0.04070 

 h = -f 0.00504 



R = 



0.1006 

 0.16(55 



= -f <).()(i!)4 



Substituting these results in the equations of condition, we find that the probable 



Z' 



error of a single observed value of is ^ 0.024, and the probable error of a com- 



yi 



putcd value of r is -j- 0.007. 



7' 



In a precisely similar manner, from the values of ~ observed at the position of 



/! 



the After Azimuth Compass, we obtain the following equations of condition. 



