224 



ASTRONOMY. 



TABLE H. 



Tabulation of results for longitude of astronomical station near mouth of Bio Grande^ derived from 

 r' nervations made taith A^-inch transit, (by TrougJiton & SimmSj) and ivith sidereal clironometer 

 No. 2440 J (hy Parkinson & Frodsham) hy G. C. Gardner and J. H. Clark ^ under tJie direction 

 of 3Iajor W» H. Emory , Chief Astronomer and Surveyor of United States and 3Iexican boundary 

 survey. 



MOON a FIRST I. 



a 



o 



•a 



t 



to 



O 



o 



Nor. 



Longitude we^Jt of Greenwich, deduced from 

 corresponding observations made at^ 



Greenwich 



Observatory. 



1853. 

 August 12 



13 

 15 

 16 

 17 

 Sept. 12 



13 

 14 

 15 

 16 



October 9 



10 



19 



13 



8 

 9 



10 

 11 

 12 

 13 

 14 



6 28 35.04 

 6 28 40.00 

 6 28 35.91 

 6 28 39.85 

 6 28 29.28 

 6 28 30.23 

 6 28 30.43 

 6 28 37.03 

 6 28 37.19 

 6 28 30.72 

 6 28 38.86 

 6 28 40 56 

 6 28 24.11 

 6 28 20.87 

 6 28 36.94 

 6 98 34.05 

 6 28 32.15 

 6 28 26.23 

 6 28 23.32 

 6 28 34 55 

 6 28 35.93 

 6 28 33.60 



Kadcliffe Ob- 

 servatory. 



Philadelphia 



High School Ob 



servatory. 



A. 771. S, 



hm 7n. s 



1 



6 28 30.60 



6 28 23.86 



6 28 34.53 

 6 28 30.50 

 6 28 31.07 



6 28 24.96 

 6 28 28.00 



6 28 30.44 







o 





m 



o 





^ 

 U) 



35,04 



40.00 



35.91 



39.85 



29.28 



30.23 



91.68 



37.08 



37.19 



78.44 



38.86 



40.56 



74.03 



76.87 



36.94 

 68.58 

 62.65 

 57.30 



23.32 

 34.55 

 35.93 

 64.04 



o 



'■a 



> 



O 



1853. 

 Aug. 18 



19 



20 



21 



22 



23 



24 



Sept. 17 

 18 



Oct. 17 

 18 

 19 

 20 

 21 



Nov. 14 

 15 

 18 

 21 

 22 



^um of adopted values of the observations for each night, 1063.33 



No. of observations giving to each its value* 



31.42 



34 



moon's second li.mb. 



Longitude west of Grecmvichj deduced from 

 corresponding observations made at — 



Greenwich 

 Observatory. 



h, TTl, 5. 



6 28 20.69 

 6 28 22.33 

 6 28 14.71 

 6 28 27.27 

 6 23 27.22 

 6 28 33.54 

 6 28 ^.10 

 6 28 24.60 

 6 28 29.69 

 6 28 25.89 

 6 28 20.69 

 6 28 24,85 

 6 28 42.03 

 6 28 41.25 

 6 28 33.60 

 6 28 28.41 

 6 28 28.67 

 6 28 29.45 

 6 23 26.91 



Radcliffe Ob- 

 servalorv. 



Philadelphia 



High School Ob 



servatory. 



A, 771. S 



k. m, s. 



6 28 33.62 



6 28 35.90 



6 28 36.03 

 6 28 34.37 

 6 28 24.09 

 6 28 27.56 







6 28 30.44 





\# ""^rf *^\* * A A 



- 















«3 





*— ' 



Im 





DO 



a 





3 



tn 







a 





« 



o 





> 







-^ 







V 



> 



^ 





^ 



^J 



o* 



OJ 



x: 



o 



< 



o 



to 



"5 



s. 



20.69 



89.57 

 14.71 

 99.07 

 27.22 



33.54 

 32.10 



21.60 

 101.75 

 94.63 

 68.87 

 79.98 

 42.03 

 41,25 

 64.04 

 28,41 

 28.67 

 29.45 

 26,91 



Sum of adopted values of the observations for each night, 947.49 

 No. of observations giving to each its value* 



29.61 



33 



Resulting longitudes from observations on moon's 1st limb... 

 Do do 



A. m. 9. 



6 28 31.42 Meanlondtude 



h. m. f. 

 6 28 30.52 



do 2d limb... = 6 28 29.61 



Longitude of astronomical station near mouth of Rio Grande, west of Greenwich Observatory' 



6h, 28m. 30S.52 



Note.— Radcliffe Obser\^'itory is 5m. 02s.60 west of Greenwich, (Rad. Observations, vol. XFV, page IX.) High School Observatorj^, Philadelphia, 

 is 5A. OOw. 37s. 56 u c:-t of Greenwich Observatory. In reducing the results from the Radcliffe and High School observations to Greenwich observa- 

 tions, the above differences of longitudes have been applied. 



* In the column " Adopted values of the observations for each night," the results have been obtained by giving double weight to the High Schoo] 

 observations, on account of its relative distance from the mouth of die Rio Grande, and equal weight to Radcliffe and Greenwich observations. 



