176 



LONGITUDE. 



logues, (British Association catalogue and 

 (Table yi;) 3P 20' 57''.56. 



) and the latitude deduced, 



from 



f 



56". 4o. 



year catalogue and partly from 



tlie latitude (Table VII) 31° 20 



7. The latitude of Carrizalillo, resulting from ^1 observations on 14 pairs of stars, selected 

 entirely from the Greenwich Twelve-year catalogue, is (Table VIII) 31° 50' 55". 23 ; longitude, 

 (Table IX) T 11"' 44'.26 = 107° 56' 03".9. 



8. The result for the initial point on the Eio 



from 



from the Greenwich Twelv$-year catalogue, is (Table X) 



31° ^.6' 51". 29. 



TABLE I. 



for longitude of astronomical station at Las Nogales, east of the intersection of 



degree of longitude and the parallel of 31° 20' north latitude. 



Date. 





Authority for Results for 



elements used. I moon's Ist 



limb. 



1855. 

 May 24 | N. A. A. Rs. 

 25 



26 

 28 

 29 



do 

 do 



do 



do 



7 23 19,20 

 20.41 

 27.92 

 32.87 

 25.78 



Mean longitude from moon's 1st 

 limb Ih. 23«i. 25.245. 



Date 



Authority for 

 elements used. 



Results for 

 moon's 2d 

 limb. 



1B55. 



May 30 N. A. A. Ra 



31 



do 



7 23 23.24 



26.71 



I 



Mean longitude from moon's 2d 



Jimb 7A. 23»i. 24.97s. 



Mean longitude from moon's 1st 

 7A. 23m. 25.24s. 



Date 



Authority for Results for 

 elements used, moon's 1st 



limb. 





Date. 



1855. 

 June 22 



28 



N. A, A. Rs. 



do 



K» m. s. 



7 23 42.93 

 15.83 



1855. 

 June 28 



Authority for 

 elements used. 



Results for 

 moon's 2d 

 limb. 



N. A. A. Rs. 



July 



Mean longitude from moon's 1st 

 limb 7A. 23/n. 29.40s. 



h. tn. ffi 

 7 23 16.76 

 17.14 



20.78 



Mean longitude from moon's 2d 

 limb 7A. 23m. 18.23j. 



Mean longitude from moon's 1st 

 limb..,,. 7A. 23/n. 29.40s. 



A. m. s. 



Mean longitude from 1st lunation,.., 7 23 25.10 Mean longitude from 2d lunation 



Mean longitude from 2d lunation 23.81 



Longitude of Station 7 23 24.45 



7 23 23.81 



Date. 



Jlay 



1855."' 

 24 



25 

 26 



28 

 29 



30 



Results for longitude during 

 two lunations. 



7 

 7 

 7 



7 

 7 

 7 



23 

 23 



23 

 23 

 23 

 23 



9. 



19. 200 

 20.410 

 27.920 

 32. 870 

 25. 780 

 23. 240 



Date. 



Results for longitude during 

 two lunations. 



7 

 7 

 7 

 7 

 7 

 7 



23 

 23 

 23 

 23 

 23 

 23 



26.710 

 42. 930 

 15. 884 

 16.764 

 17. 140 

 20. 780 



Lon 



