LONGITUDE. 



223 



yf probahle error of the final result for longitude of 



of the Rio Grande. 



1, RESULTS FROM GREENWICH OBSERVATIONS. 







(Final longitude = 



= 6A. 287n. 30«.48.) 







Dale. 



Each result. 



A (final re- A^ 



p 



Date. Each result. 



A (final re- 



A 







suit — each 









sult — each 







result.) 









result.) 





1853. 



s. 



$. 



s. 



1853. 



«. 



«. 





Aug. 12 



35.04 



4.56' 



20.79 



Oct. 10 



40.56 



10.08 



101.61 



13 



40.00 



9,53 



90,63 



12 



24.11 



6.37 



40.57 



15 



35.91 



5.43 



59.43 



13 



20.87 



9.61 



92.35 



16 



39.85 



9.37 



87.73 



17 



25,89 



4.59 



21.07 



17 



29.28 



1.20 



1.44 



18 



20.69 



9.79 



95.84 



18 



20.69 



9.79 



95.84 



19 



2 J . 86 



5.62 



31.58 



\^ 



22.33 



8.15 



66.42 



20 



42.03 



11.55 



133.40 



20 



14.71 



15.77 



248.69 



21 



41.25 



10.77 



1 



116.00 



31 



27.27 



3.21 



10.. 10 



1 Nov. 7 



36.94 



6.46 



41.73 



Si2 



27.22 



3.26 



10.63 



8 



1 



34.05 



3.57 



12.74 



23 



33.54 



3.0G 



9.36 



1 



9 



32.15 \ 



1.67 



2.79 



24 



32.10 



1.62 



2.62 



10 



26.23 



4.25 



18.06 



Sept. 12 



. 30.23 



0.25 



0.06 1 



1 



11 



J 



23.32 



* 7.16 



51,26 



13 



30.48 



0.00 



0.00 



1 



12 



34.55 



4.07 



16.56 



14 



37.08 



6.60 



1 



43.56 



1 13 



1 



35.93 



5.45 



29.80 



15 



37.19 



6.71 



46.02 



14 



33.60 



3.12 



9.73 



16 



30.72 



1 



0.24 



1 



0.06 



15 



28.41 



2.07 



4.28 



17 



24.60 



5.88 



34.57 



18 



28.67 



1.81 



3.28 



18 



29.69 



0.79 



0.62 , 

 70.22 



21 



[ 



29.45 



1,03 



1.06 



Oct. 9 



38.86 



8.38 



22 



25.91 



3.57 



12.74 



Id 



I RESULTS 



1 FROM PHILADELPAL 



1 HIGH SCHOOL OBSI 



ilRVATIOXS 



It 







* (Final longitude = 



i6A. 28m. 39s. 48.) 







Date. 



Each result. 



A (final re- 

 sult — each 



A2 



Date. 



;Each result. 



A (final re- 

 sult—each 



A3 







result.) 



« 





« 



result.) 





1853. 



ff. 



s. 



5. 



1853. 



8, 



«. 



«. 



Aug. 19 



33.69 



3.14 



9.86 



Oct. 12 



24.96 



5.52 



30.47 



21 



35.90 



5.42 



29.37 



13 



28.00 



d.48 



6.04 



Sept. 13 



30.60 



0.12 



0.01 



17 



34.37 



3.89 



15.13 



16 



23.86 



6.62 



43.82 



18 



24.09 



6.39 



40.83 



18 



36.03 



5.55 



30.80 



19 

 1 



27.56 



2.92 



8.53 



RESULTS 



kT* 



(Finanongitude = 6A. 28m. 30s. 48.) 



Date. 



1853. 

 Nov. 8 



9 



Each result. A (final re- i 



suit — each 

 result.) 



34.53 

 30.50 



4.05 

 0.02 



A3 



16.40 



0.00 



Date, 



■ 



14 



Each result. A (final re- 

 sult—each 

 result.) 



1853. 

 Nov. 10 



31.07 

 30.44 



8. 



0.59 

 0.04 



1 



I 



A3 



s. 



0.35 

 0.00 



Final longitude 

 Probable error 



6A, 2am. 30s. 48 

 ± Os.56 



