196 



REPORT ON 



Comparing these computed values with the values before founu directly from the 

 observations, the following residuals are obtained: 



Value of the Computed minus the Observed Coefficients of the Deviations of the 

 Admiralty Standard Compass. 



STATION. 



DATE. 



21 



33 



<s 



© 



@ 



Hampton Roads . . . 



November I , 



1861; 





4- 0.004 



+ 0.007 



— 0.004 



+ °-°°3 



St. Thomas 







November 1 8, 



186S 





— 0.006 



— 0.012 



+ O.OII 



4" 0.012 



Bahia . 









December 30, 



186S 





+ 0.002 



O.OOI 



+ O.OOI 



O.OOI 



Monte Video 









January 24, 



1866 





— 0. 006 



— 0.003 



— 0.007 



— 0.005 



Sandy Point 









February 10, 



1806 





+ O.OOI 



4- 0.012 



+ O.OOI 



O.OOI 



Valparaiso '. 









April 4, 



1866 





+ 0.008 



— O.OOI 



+ O.OOI 



4- 0.002 



Callao . 









April 29, 



1866 





— 0.004 



— 0.005 



-j- O.OOI 



— 0.003 



Panama . 









May 20, 



1866 





— 0.004 



— 0.007 



0.000 



— 0.003 



Acapulco . 









June 1 , 



1 866 





4- 0.004 



— 0.009 



O.OOI 



— 0.003 



San Francisco 









June 23, 



1866 





0.000 



+ O.OII 



O.OOI 



O.OOI 



Value of the Computed minus the Observed Coefficients of the Deviations of the 

 After Binnacle Compass. 



STATION. 



DATE. 



21 



23 



g 



© 



<g 



Hampton Roads . . . 



November 1, 



186^ 





-f- O.OOI 



+ O.OOI 



4" O.OOI 



— iO.OOI 



St. Thomas . 









November 18, 



186s 













Bahia . 











December 30, 



1861; 





— 0.004 



4- O.OOI 



4- 0.004 



— 0.004 



Monte Video 











January 24, 



186b 





4- 0.002 



■ — 0.009 



O.OOI 



4- O.OIO 



Sandy Point 











February 10, 



1866 





— 0.003 



4- 0.014 



— 002 



O.OOI 



Valparaiso . 











April 4, 



1866 





4" O.OII 



O.OOI 



0.000 



— 0.002 



Callao . 











April 2Q, 



1866 





— 0.006 



— 0.002 



— 0.002 



— 0.004 



Panama . 











May 20, 



1866 





— ■ 0.003 



— 0.017 



— 0.008 



4- °-°°3 



Acapulco . 











June 1 , 



1866 





— 0.003 



— 0.007 



— 0.003 



4- 0.004 



San Francisco 











June 23, 



1866 





4- 0.002 



4-0.015 



4- 0.006 



— 0.002 



Value of the Computed minus the Observed Coefficients of the Deviations of the 

 After Ritchie Compass. 



STATION. 



DATE. 



SI 



23 



<£ 



© 



<g 



Hampton Roads . 



November 1, 1865 





4" O.OII 



4- 0.012 



+ O.OIO 



4- 0.021 



St. Thomas 







November 18 



1865 





— 0.017 



— 0.027 



O.OIO 



4- 0.008 



Bahia . 









December 39 



1865 





— ' 0.008 



— 0.003 



— 0.008 



— 0.003 



Monte Video 









January 24 



1866 













Sandy Point 









February 10 



1866 





4- 0.009 



4- °-°35 



4- 0.012 



— 0.014 



Valparaiso . 









April 4 



1866 





4- 0.012 



— 0.021 



— 0.009 



— 0.003 



Callao . 









April 29 



1866 





— 0.026 



— 0.015 



4- 0.002 



— 0.017 



Panama'. 









May 20 



1866 





4- 0.009 



— 0.002 



+ 0.009 



4- 0.026 



Acapulco . 









June 1 



1866 





4- 0.002 



— 0.024 



4- O.OIO 



— 0.016 



San Francisco 









June 23 



1866 





4- O.OOI 



4- 0.028 



— 0.016 



— 0.004 



