LATITUDE- 



193 



The taWes ajjpended present a recapitulation of all the results for the latitudes of the primary 

 stations, giving results which have been adopted, as follows, viz : 



F', 



H 



stars observed near the zenith, is determined by combining the results, as in table herewith, 

 marked VIII, to be in latitude = 31° 48' 44".53. 



The table marked IX, indicates the corrections derived from actual observations of the stars 



Washin 



Wl 



observations on eight stars, to be in latitude 31° 35' 12". 62, the individual results being com- 



bined as shown in table X. 



/ 



Maj 



31° 2' 2ryM5; as determined 

 -irs of stars near the zenith ; 



the individual results "being combined as shown in table marked XI. Table XIa, shows 

 the corrections which have been applied as indicated in table XI, in order to introduce the 

 stars' elements as given in the ^^ Twelve-Year Catalogue. 



J J 



n 



Major W, H. Emory in 1852^ from 121 observations on twcuty-six pairs of stars near tlie zenith, 

 combined as shown in table marked XIL Table Xlla^ shows tlio corrections which have 

 been applied as indicated in table XII, in order to introduce the stars' positions as given in 

 the " Twelve-Year Catalogue." 



Duncan (Eagle Pass) is in latitude 28° 42' 43". 67, as deter-nined by Lieutenant N. 



Fort 



Michler, topographical engineers, in 1852, from eighty-seven altitudes of north and south stars, 

 observed with a sextant, combined as in table marked XIII. 



/. Einggold Barrachs (observatory) is in latitude 26° 22' 27". T9, as determined by Major 

 Emory in 1853, from 107 observations on thirty-two pairs of stars near the zenith, combined as 

 shown in table marked XIY. Table XIYa, shows the corrections which have been applied 

 as indicated in table XIV, in order to give to the stars their positions furnished in the 

 " Twelve- Year Catalooiue." 



/ 



as determined by Major W. H. Emory in 1853, from 129 observations on twenty pairs of stars 

 near the zenith, combined as shown in table marked XV. 



The papers herewith have been arranged in this manner with a view to facilitate you in pre- 

 paring them for such further use as you may deem best. 



Very respectfully, your obedient servant, 



GEO. THOM, 



Wm 



Captain Topographical Engineers. 



♦ This place was Hubsequently determined by myself, not knowing that Lieuteuaat Whipple had observed there ; but finding he 

 had done so, I gave his obBervations priority. — W. H. E. 



Vol. 1—25 



