LATITUDE. 



227 



TABLE VI IL 



ibulation^ of results for tie latitude of astronomical station at Frontera, Texas derived fi 

 observations made loitli the zenith telescope No. 4, on itoenty-four pairs of stars ' By Major 

 H. Emory, Chief Astronomer and Surveyor of United States and Mexican boundary survey 



W 



1st pair. 



Date. 





2d pair. 



dd pair. 



B. A. C. 



2194 S. 

 2270 N. 



B. A. C. 



2444 S. 

 2341 N. 



B. A. C. 



2504 N. 



1852, March 23 



34 



95 

 26 

 27 



38 



30 



o / 



// 





/ 



// 



It 



31 48 42.63 



Latitude by a mean of eacff pair. 

 Corrections for declination 



Corrected latitude 



31 48 42.63 



0.00 



31 48 42.63 



31 48 44.19 



31 48 46.35 



31 48 44.44 



31 48 41. 



31 48 40.03 

 31 48 38.60 

 31 48 41.18 

 31 48 43.93 



31 48 44. i^ 



0.00 



31 48 44.99 



31 48 41.08 

 + 1.20 



31 48 42.28 



4th pair. 



5th pair. 



B. A. C. 



2472 S. 



2504 N. 



R A. C. 



2605 S. 



2691 N. 



• i n 

 31 48 45.44 



31 48 51.55 



31 48 39.20 

 31 48 43.67 

 31 48 37.33 



31 48 47.63 

 31 48 50.31 

 31 48 47.66 



31 -i^ 00.79 

 3( 48 38.77 



31 48 48.60 



0.00 



31 48 48.60 



31 48 45.55 

 + 0.69 



31 48 46.24 



6th pair. 



B. A. C. 



2788 S. 

 2798 N. 



21 48 48.81 

 — 3.28 



31 48 45.53 



• / // 

 31 48 47.48 



31 48 48.23 



31 48 49 97 



31 48 49 01 

 31 48 49.33 

 31 48 49.76 

 31 48 48 56 



7th pail 



B. A. C. 



2818 S. 

 2855 N. 



31 48 45.62 

 31 48 43.56 

 31 48 44 Oi 

 31 48 44. OJ 

 31 46 44 20 

 31 48 43.12 

 31 48 45.23 



31 48 44.25 

 — 1.00 



31 48 43.25 



TABLE VITT— Continued. 



Date. 



18523 March 23 



24 



25 



26 

 27 

 28 

 30 



Latitude by a mean of each pair. 

 Corrections for declination 



Corrected latitude 



8th pair. 



B. A. C. 



2952 3. 



2912 N. 



31 48 50.75 

 31 48 49.85 

 31 48 48.87 

 31 48 48.93 

 31 48 50.09 

 31 48 49.93 

 31 48 48.48 



31 48 49.56 

 — 3.11 



31 48 46.45 



9th pair. 



B. A. C, 

 3109 S. 

 3033 N. 



31 48 44.97 



31 48 42.01 



31 48 46.18 

 31 48 43.94 

 31 48 44.70 

 31 48 44.45 



31 48 44.37 

 + 1.27 



31 48 45.64 



10th pair. 



11th pair, 



B. A. C, 



3181 S. 

 3131 N. 



B. A* C 



3201 9. 

 32.52 N. 



• / ft 

 31 48 34.71 



• / // 

 31 48 45 88 



12th pair. 



B. A. C. 



3201 S. 

 3261 N. 



31 48 49.25 



13ih pair. 



B. A. C. 



3355 a. 

 3399 N. 



• / // 

 31 48 46.75 



31 48 40.26 

 31 48 41.27 

 31 48 42.01 

 31 48 42.64 

 31 48 41.37 



31 48 43.12 

 31 48 46.26 

 31 48 46.81 



31 48 42.88 

 31 48 44.41 

 31 48 44.94 



31 48 40.38 

 + 1.56 



31 48 46.14 



31 48 47.21 



31 48 48.25 

 31 48 47.64 

 31 48 50.31 



31 48 45.64 

 — 1.86 



31 48 45.74 

 — 2.86 



31 48 41.94 



31 48 43.78 



31 43 42.88 



31 48 47.19 



31 48 48.03 

 — 3.91 



31 48 44.12 I 



14th pair. 



B. A. C. 



3409 S. 

 3127 N. 



// 



31 48 48.33 

 31 48 48.20 



31 48 49.68 



31 48 48.74 

 — 1.21 



31 48 47,53 



TABLE YIU— Continued. 



Date. 



Ib^, March 23 



24 



25 



26. 



27. 



28. 

 30. 



15th pair. 



D. A. C 



3671 S, 

 3584 N. 



t 



n 



31 48 ^.88 



16th pair 



17lh pair 



B. A. C 



3710 S. 



3736 N. 



B. A. C. 

 3842 S. 



3781 N, 



18th pair. 



B. A. C. 

 3915 S. 

 3952 N. 



19th pair 



20th pair. 



B. A. C. 



3990 S. 

 3973 N. 



B. A. C. 



4014 S. 

 40-26 N. 



/ 



// 



31 48 43.03 

 31 48 43.78 



31 48 44.87 



31 48 39.15 

 31 48 41.70 

 31 48 40,77 



• / If 

 31 48 45.40 



21st pair. 



31 48 45.28 



• / // 

 31 48 45.81 



B. A. C. 



4014 S. 

 4028 N. 



*» t If ^ I II 



31 48 45.73 31 48 43.36 



31 48 42.27 

 31 48 43.73 

 31 43 45.56 



31 48 45.28 j 31 48 45.39 j 31 48 47.69 

 31 48 44.49 . 31 48 44.88 31 48 45.92 

 31 48 46.58 ' 31 48 45.30 31 4S 48.59 



31 48 44.58 



31 48 43,00 





31 48 42.26 



31 48 44.99 31 48 47.37 



,\. 



31 48 48.38 

 31 48 45.82 

 31 48 48.74 



1 



22d pair. 



B. A. C 

 4066 S. 

 4126 N. 



// 



31 48 48.07 i 31 48 50.56 



i 



,.J 



Latitude by a mean of each pair 31 48 43.83 



0#rrectiong for declination 



0,12 



31 48 41.15 

 + 2.69 



31 48 43.84 

 — 0.33 



31 48 45.41 31 48 45.27 31 48 47.06 



0.00 



1,61 



2.22 



31 48 46.87 

 — 2.95 



Corrected latitude 3148 43.71 31 48 43.84 i 3148 43.51, 3148 45.41 3148 43.66 3148 44.84 



1 



! 



31 48 50.56 

 — 1.25 



31 48 43.92 , 31 48 49.31 



