161 



GEODPJST. 



Log. m" 



Log. sin. Z 



Log. COS. H 



2d term P 



153". 5 4 



2.10612*73 



( 



9.9457G51 



2.1118924 



9.9256623 



2.1862301 



2' 33".54 



P 



111° 03' 16''. 5 



2d term 



2' 33".54 



P. or long. 

 of West Base 



ll'?^ 05' 50". 04 



od term 

 Log. u" 



Log. fiin. Z 



Log. (w"sin. Z) 2 



Log 

 Log 



Sin. 1 '^ 

 2 



Log. tang. H 



2.1661273 



9.9457651 



2.1118924 



2 



4.2237848 



(l-f c^cos.-H) = 0.0020130 



4.3845449 



9.8057664 



8 4141100 



Calculation of Hit Azimuili of the line from Initial Point of tlie Boundary to Fast Base 



Log K 



1 



N. sin. 1 

 Sin. Z 



tr 



Cos. L 



; 



Sin . L -f L' 



2 



64".57 



3.8774050 



8.5093881 



9.6181471 



2.0049402 



9.9258689 



2.0790713 

 9.7309790 



1.8100503 



7540.59. Z'=180 + Z 



Measured Z 



Z 



/ 



u'^ Sin. Z . 1 /T I T ^\ 



__sm.|(L + L) 



24° 31' 16" 



4" 15 err. in meridian. 



24° 31' 31 



tr 



180 



O 



204^ 3r 3r 



V 04". 5 



204° 30' 26". 5 



VI. 



^f straight line from Initial Point on the Pacijic to Junction of 



In the computation for the direction of the line, the longitude of the initial point and the 

 longitude of the junction of the Gila and Colorado are taken as determined in the field hy the 

 ohservations compared with the moon's place^ as given in the Kautical Almanac (Greenwich.) 

 On arriving at Washington, I ohtained from Professor Airy his corresponding ohservations, 

 made at Greenwich, and it will he seen that a change has heen made in the ahsolute longitude 

 of both places, hut fortunately no material change is discoverable in the relative longitude of 



diffi 



element 



Hence the change deduced from comparison with the corresponding Greenwich observations 

 does not affect this result. 



The preceding pages show the process by which the latitude and longitude of Camp Kiloy 

 was transferred to the initial point of the boundary on the Pacific. 



