194 



ASTRONOMY. 



TABLE I. 



of results'^ for longitude of astroncmical station at Frontera observatory, derived f 



JSfo. 2440, (bif Parkinson 



Frodsham ;) By Major Wm. S, Emory, Chief Astronomer and Surveyor United States and 



Mexi 



Date. 



1851. 



Dec. 29 



30 

 31 



1582. 



Jan. 1 



3 



Moon's first limb. 



Date. 



Moon's secM limb. 





Date. 



Moon's first limb. 



A. fn. s, 



7 06 05.1 



08.2 

 13.1 



09.0 

 13.2 



Mean 



7 06 08.66 



1852. 



Jan, 7 



8 

 9 



A. in. s. 

 7 06 03.7 



22.0 



15.4 



06.4 



21.2 



1852. 



Feb. 28 



29 



Mar. 1 



2 

 3 



7 06 06.0 

 08.1 

 17.8 

 14.1 

 13.3 

 19.7 

 17.4 



Mean— 2d limb . ». 

 Mean— 1 St limb. ., 



h. m. s. 

 7 06 14.74 



08.66 



Mean 



h, m, s. 

 1 m 13.77 



Mean longitude from first lunation 



7 06 11.70 







Date. 



1852. 

 Jan. 29 



Moon's first limb. 



30 



Feb. 



2 

 4 



A. m. s. 



7 06 16.6 



11,2 



17.7 

 19.6 

 09.1 



Date. 



Moon's sec'd limb. 



1852. 

 Feb. 4 



5 



7 



9 



10 



11 



Mean 



h, m. 9. 



7 06 14.96 



Mean — 2il limb . . . 

 3Iean— li^l limb... 





Mean lonKiluUe from second lunation 



7 OG 10.2 

 06.3 

 14.2 

 13.6 

 07.7 

 i7.1 



7 U6 11.52 

 14.96 



7 06 13.24 



Mean lonKitude from ibird lanation 







Date. 



Moon's first limb. 



1852. 

 Mar. 31 



1 



April 



3 



K. m. s, 



7 06 08.6 



05.6 

 IG.l 



Mean 



= 1 06 10.1 



Moon's sec'd limb. 



1852. 

 Mar. 



4 

 5 

 6 



8 



h. in. 5. 

 7 OS 20.0 



13.8 



09.6 



14.8 



Mean— 2d limb . 

 Mean— 1st limb. 



7 06 14.55 

 13.77 



Mean longitude from fourtb lunation 



7 06 14.16 



Date. 



Moon's sec'd limb 



1852. 

 Ajwil 4 



6 



Mean— 2d limb 

 Mean— 1st limb 



h. w. «. 

 7 00 13,9 



13.9 

 19.8 



7 06 15.87 

 10. 10 



hk 7/li 9* 



7 06 12.93 



Fffst 



Second 



Third - 



Fonrlh 



Lunation. 



• Lonintude of Frontera 



Longitude deduced- 





A, m. 8, 



7 OS 11.70 



7 06 13.21 

 7 06 14.16 

 7 06 12.98 



7 06 13.03 



* Bcd'Jccd from Greenwich obscrrationB for 1851-'fl2- 



