M AQNETIG OBSERVATION S. 



197 



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

 After Azimuth Compass. 



STATION. 



DATE. 



21 



93 



E 



© 



<s 



Hampton Roads . 



November I , 



1S6S 





— O.OOI 



-f- O.OII 



-f- O.OII 



— 0.C03 



St. 'I hum. is 









November is, 



iSOs 





. — 0.006 



— 0.021 



— o.coS 



— 0.002 



Baliia 











December 30, 



1 86s 





+ 0.015 



+ 0.003 



— 0.020 



+ 0.019 



Monte Video 











January 24, 



i860 













Sandy Point 











February 10, 



i860 





— O.OIO 



4- 0.004 



— 0.014 



+ 0.007 



Valparaiso . 











April 4, 



1866 





4- 0.021 



— 0.008 



4- 0.006 



O.OIO 



Callao . 











April 29, 



1866 





— 0.026 



+ 0.017 



4- 0.022 



O.OI I 



Panama . 











May 20, 



1866 





4- 0.007 



— 0.021 



O.OOI 



4" O.OI2 



Acapulco . 











June 1 , 



1 866 





-f- O.OOI 



+ O.OII 



4- 0.007 



— 0.007 



San Francisco 











June 23, 



1866 













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

 Forward Alidade Compass. 



STATION. 



DATE. 



21 



33 



e 



£> 



<S 



Hampton Roads . 



November 1, 



iS6s 





4- 0.003 



4- 0.006 



4- 0.005 



O.OOI 



St. Thomas . 









November iS, 



1865 





— 0.027 



— 0.005 



4- 0.002 



1 — 0.006 



Bahia 









December 30, 



1865 





4- 0.002 



O.OIO 



4- 0.002 



— 0.004 



Monte Video ' 











January 24, 



1866 





— 0.005 



— 0.002 



0.000 



4- 0.004 



Sandy Point 











February 10, 



1866 





4- 0.007 



4-0.013 



— 0.007 



4- 0.007 



Valparaiso . 











April 4, 



1866 





4- 0.003 



— 0.007 



4- 0.005 



4- 0.002 



Callao . 











April 29, 



1866 





O.OII 



4- 0.006 



— 0.002 



4- 0.003 



Panama . 











May 20, 



1866 





O.OIO 



4- O.OOI 



4- O.OOI 



4- 0.003 



Acapulco . 











June p 1, 



1866 





4- 0.012 



— 0.014 



— 0.009 



— 0.002 



San Francisco 











June 23, 



1866 





4- 0.002 



4- 0.007 



4- 0.007 



— 0.007 



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

 Forward Binnacle Compass. 



STATION. 



DATE. 



21 



93 



e 



© 



g 



Hampton Roads . 



November 1 , 



1S65 





0.000 



4- 0-013 



— 0.007 



— 0.006 



St. Thomas 







November iS, 



1865 





— 0.002 



— 0.016 



4- 0.002 



4- 0.003 



Bahia . 









December 30, 



1865 





4- 0.007 



O.OIO 



0.000 



4- 0.004 



Monte Video 









January 24, 



1866 





— 0.005 



— 0.007 



4- 0.005 



4- 0.002 



Sandy Point 









February 10, 



1866 





— 0.008 



4- 0.022 



— 0.002 



4- 0005 



Valparaiso . 









April 4, 



1866 





4-0.015 



— 0.013 



4- 0.009 



4- 0.004 



Callao . . 









April 29, 



1866 





— 0.005 



4- 0.008 



0.000 



— 0.005 



Panama. 









May 20, 



1 866 





• — 0.004 



— 0.006 



0.000 



4- 0.007 



Acapulco . 









June 1 , 



1866 





4- 0.003 



— 0.006 



— 0.009 



— 0.003 



San Francisco 









June 23, 



1866 





O.OOI 



4- 0.006 



4- 0.002 



— 0.013 



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

 Forward Ritchie Compass. 



STATION. 



DATE. 





21 



93 



e 



© 



<S 



Hampton Roads . . . 



November I , 



1S65 





4- 0.009 



4- 0.007 



4- -°°3 



— 0.007 



St. Thomas 









November 18, 



1865 





— 0.004 



O.OIO 



— 0.016 



4- 0.007 



Bahia . . 











December 30, 



1865 





— 0.013 



4- O.OOI 



— 0.006 



4- O.OOI 



Monte Video 











Tanuary 24, 



1866 





— 0.009 



— 0.022 



4- O.OOI 



4- 0.007 



Sandy Point 











February io, 



1 866 





0.000 



4- 0-035 



4- 0.002 



4- 0.005 



Valparaiso . 











April 4, 



1866 





4- 0.022 



— 0.006 



4- 0.004 



— 0.009 



Callao . 











April 29, 



1 866 





— 0.005 



■ — 0.007 



— 0.003 



— 0.003 



Panama. 











May 20, 



1866 





4- 0.007 



— 0.018 



4- 0-003 



4- 000 3 



Acapulco . 











June 1 , 



1866 





— 0.006 



— 0.01S 



0.000 



— 0.008 



San Francisco 











June 23, 



1866 





— 0.005 



4- 0.025 



4- 0.016 



4- 0.008 



