202 



ASTRONOMY. 



TABLE V— Continued, 



Comparison of results for longitude of station near Presidio del Norte, for each date of 



nth Tab. B. A, in Nautical Almanac and Greenwich obsei 



*vatii 



Date of obser- 

 vation. 



I 

 Long, computed with . 



N, Almanac R. A. 



Long, computed with 

 Greenwich observa- 

 tions. 



Greenwich obser- 

 vations -f N". Al- 

 manac, or diHer- 











ence. 



- 



1852. 



h, m. s. 

 6 57 18.17 



6 57 37 53 



s. 



+ 19.36 







27,32 



47.67 



20.35 







37.41 



55.76 



18.35 







17.00 



34.50 



17.50 







22.82 



39.66 



16.84 





31 



11.67 



28.78 



17.11 



1 







35.48 

 06.73 



43.27 



32.89 



7.79 

 26.16 







25.13 



40.42 



15.29 







36.06 



47.38 



11.32 







24.76 



44.76 



20.00 



^ 





17.56 



39,02 



21.46 





27 



06.04 



41.35 



35.31 







03.41 



20.30 



16.89 





29 



6 57 08.70 



6 57 33.10 



-J- 24.40 









— 15)288.13 













= + 19s. 21 











r 



Comparison of mean results for longitude^ obtained from observations on moon's li nbSj as computed 



with Tah. It. A. in Nautical Almanac and Greenwich observations. 



FIRST. 



Mean of results of observations on moon's first limb, computed from Tabular Right Ascensions in Nautical Almanac 

 Mean of results of observations on moon's first limb, computed from Greenwich observations 



■ B 



• ■«•«•■ 



6 57 18.96 

 6 57 40.11 



Difierenccj or Greenwich observations + Nautical Almanac 



SECOND. 



Mean of results of observations on moon's second limb, computed from Tabular Right Ascensions in Nautical Almanac 

 Mean of results of observations on moon's second limb, computed from Greenwich observations 



+ 21.15 



6 57 20.94 

 6 67 37.93 



Difference, or Greenwich observations + Nautical Almanac 



+ 16.99 



Corrections to be applied to results obtained from computations (luith tabular B. A. in Nautical 



Almanac^ of observations made near Presidio del Norte, 



Observed difference of longitude between Greenwich and Cambridge, July 28 

 Established longitude of Cambridge, west of Greenwich 



Observed longitude east of established longitude 



A. wi. *• 



4 44 19.06 

 4 44 29.60 



10.54 



Observed difference of longitude between Greenwich and Cambridge, August 24 

 Established longitude of Cambridge, west of Greenwich 



4 44 17.62 

 4 44 29.60 



Observed longitude east of established longitude 



Difference, July 28. 

 Do..,, Aug. 24 



11.98 



10.54 

 11.98 



Sum 



Mean conectlon to be applied 



22.52 



+ 



11.26 



