TI. — Besulla of calculations of geodetic latitudes and longitudes of points of triangidation of a line ^Hwenty English miles in length,'' exlendinq 

 from the Monumenty near the junction of the Gila and Colorado^ to the Initial Point of the neio azimuth line. ^ '" ' " ' ^' ■ " 



Mtchler^ Topographical Engineers U. S. A. Comjjuter, John O'Donoghue. Instrumeiit^ Bruner Theodolite. 



Triangulation by Lieut. N, 



00 



Name oT station. 



Letter 



of 

 station. 



1 



Mouument , 

 Sierra Pricta 



£ft«t Btatious . 



Observatory near initial point, on Colorado 



Monument 



Fl;ig Staff (Fo/t Yuma) 

 Pilot Knob. 



r 



West siation3 



{ 



M 

 C 



IT 



K 



R 



W 

 V 



X' 



F' 



P 

 6 



L 

 S 



T 

 W 



Z 



A' 



Observatory near initial point, on Colorado \ F' 



Name of 

 side. 



Name of 



angle. 



Azimnth, 



Angle of station.! 



M C 

 C H 

 H K 

 K Q 



R W 

 WV 

 V X' 



XT' 

 Y'Z' 

 Z' B' 

 B^ D' 



D^ F' 



F C II 



c ir K 



II K a 

 K a R 



a R AV 

 R \V V 



VV V x^ 



V X' Y' 

 X' Y' Z' 

 Y' 7J B' 

 Z' B' D' 

 B' D' F' 



• / // 

 10 13 15.7S.W. 



21 40 37 S.E. 



48 3 25 S.W. 



20 29 39 S.W. 



Length of 

 sides in 



feet. 



// 



156 



53 9 



110 16 51.5 

 907 32 15.6 



67 16 26 S.W. 133 12 58.8 



M F 

 F P 

 G P 



G li 

 L 3 



a T 



T W 



w z 



Z A' 

 A' C 

 C F 



2 3 12 S.E. 



32 23 8 S.W. 



32 2 22 S.W. 



56 56 52 S.W. 



37 44 30 S.W. 



25 35 37 S.W. 



78 29 51 S.W» 



63 50 36 S.W. 



249 19 14.7 

 145 28 41.4 



180 2.5 



155 5 11.5 

 199 12 8.8 

 192 8 16.3 

 127 5 7.9 

 142 17 35 



4,921.16 

 22,958.95 



19,247.3 



6,606.97 



4,030.91 



7,161.32 



6, 825 . 12 



5,460.98 



2,459.80 



9,677.29 



14,028.38 



16,530.94 



12,568.51 



Difference 



of Jalitude 



-j- north. 



Difference 

 of latitude 



— south. 



Difference 



of longitude 



-f- west. 



/ // 



>»«• «•*> •«« 



P F G 

 F P G 

 F G L 



G L a 



L S T 

 S T W 

 T WZ 

 WZ A 



Z A' C 



A' Q' F' 



15 59 42.8N.W. 

 83 55 37 S.W. 



51 11 20 S.E. 

 18 92 1 S.W = 



99 55 25.4 



44 56 36.7 



249 30 34,7 



43 30 S.W. 205 8 37.2 



8 55 17 S.W, 



20 11 14 S.W. 



57 49 27 S.W. 



37 13 59 S.W. 



69 25 20 S.W, 



80 33 S.W. 



145 25 35.6 

 191 16 6.2 

 217 38 34.5 

 159 24 23.3 

 213 19 5 

 191 9 10 



2,513.09 

 33,944.60 

 33,808.90 

 19,223.25 



4,216 71 



9,492.13 

 10,055.98 



9,572.11 



10,754.1 

 15,339.12 

 95 131.91 



+ 54.8439 



-f 23.9047 



/ // 



47.9230 



3 31 , 4058 

 2 7.3320 



1 1.2414 



15.4117 



1 10.8210 

 56.9812 

 32.7200 



13.2763 



1 15.7318 



2 5.2035 

 45.7492 



I It 

 + 10,2223 



+ 2 47.3941 

 + 27.0-120 

 + 43.4621 



Difference 

 of longitude 



— ca:<t. 



Latitude of 

 station. 



/ 



// 



• / .7 



32 ^Z 31.6 



1 39.3261 , :^^ 42 43.677 



«•«• t««* 



t t t 



35.7091 

 3 29.7844 

 3 0.5300 



30.2684 



1 32.7926 

 1 33.3977 



50 4506 



1 31.7140 



53.3885 

 14.8490 



+ 42.8146 

 + 33.8478 

 + 24.0835 

 4- 1 9.1879 

 + 1 10.7553 

 + 3 9.1158 

 + 2 11.7016 



9.9990 



• * ft ■ ■ * 



• * * • 



32 39 12.9712 

 32 37 4.9392 

 32 36 3.6978 

 39 35 48.2861 

 32 34 37.4651 

 32 33 40,4839 

 32 33 7.7639 



I 



I 



32 31 38.7558 

 32 29 33.5.523 

 32 28 47.8031 

 39 29 42.G470 



+ 8.1074 

 + 6 35.1997 



+ 1 10.8218 

 -}- 33.9338 

 + 17.2045 

 4- 40.5466 

 + 1 34.6496 

 + 1 23.2532 

 -f 2 47.6849 

 + 1 45.1842 



33 43 31.6 

 ^ 43 55.5047 



5 8,1915 1 32 43 19.7956 



32 39 50.0112 

 32 36 49.4752 

 32 36 19.2068 

 32 34 46.4142 

 32 33 13.0165 

 32 32 22.5659 

 32 30 50.8519 

 32 29 57.4634 

 32 29 ^.6144 



%B«tt> «««« »*■* 



First determination by east stations of triangles ... 

 Second determination by west Htaiions of triangles 



32 29 42.0470 



Lonjiitude of 





station. 





• / ti 





114 36 22.20 . 





114 36 32.4223 





114 34 53.0962 





114 37 40,4903 





114 38 7.5323 





114 38 50.9944 





114 38 47.99.^4 





114 :^'J 30.6100 





114 40 4.6578 





114 40 28.7413 





114 41 37.9292 ' 





114 42 48.6845 





114 45 57.8003 



O 



114 48 9.5019 



eod: 





114 36 22.20 



P3 



xn 



114 36 30.3074 



^^p — 



114 43 5.4371 



^ 



114 37 57.2455 





114 39 8.06T4 





114 39 42.0012 





114 39 59.2057 





114 40 39.7523 





114 43 14.4021 



M 



114 43 36.6553 





114 46 94.3402 





114 48 9.5224 





114 48 09.5019 



^ 29 42.6144 114 48 09.5224 



Mean latitude and longitude of observatory near initial point 



85.2614 



32 29 42.6307 



19.0243 



114 48 09.512 



