AZIMUTHS 



187 



9. —Azimuths for laying of tlie2mme vertical, cf-c— Continued 



Observations for the deter mination of the true meridian at San Luis Springs. 



APRIL 22, 1855.. 



o -. 



E « 





11 51 



Reading of azimuth circle, telescope Reading of azimuth circle, telescope 



directed on star. 



directed on si;£nal. 



Ver. 1 



2. 



3. 



/ 11 



I n 



t f 



I 



s. 



2S.6 91 27 20181 27 10271 27 20 



4. Ver. 1. 



2. 



3. 



4. 



/ // 



/ // 



/ (/ 



1 27 30 90 00 irAso 00 00 



12 11 55.7 91 22 30181 23 10 271 22 25 1 22 35 90 00 30 

 12 31 05.791 17 40 181 17 25271 17 Ss'l 17 50 



12 41 20.6 91 14 40181 14 25 271 14 10 1 14 50 90 01 00 



180 00 05 



• t ff \» in 

 270 00 10 |0 00 25 



270 00 35 00 55 



Reailing of azimuth circle when plane of 

 inst. stands in true meridian. 



V^er. 1. 



3. 



/ // 



/ // 



/ // 



/ // 



Ills Renilt* 



n 



C 



I 



o c S 



// 



/ rr 



i 



89 58 24.8179 58 14.8269 58 24,80 58 34.8 1 28 55.20 1 47.70 



I 



1 58.67 



89 58 36.n79 58 16.1269 58 31.10 68 41.1 1 23 53.9 



3 59 05.1 179 oS 50.1269 59 00.10 59 15 ,1 18 34,9 



I 



180 00 45 270 01 05 .0 01 20 89 59 10 ,179 53 55 *^9 59 10 59 20 I 15 30 



! 



I I I I I 1 I , 



^90 00 35^180 00 16.6^270 00 36.60 00 53.3^89 58 49.0 179 58 34.0269 58 46.5 53 57.72 



57.42 

 1 57.50 



1 40.39 



of signal from true meridian West of North 



Result April 20 , 



Error of signal by a mean of two nights' observations 



1 40.32 

 1 41.80 



1 41.06 



Observations for the determinaiion of the ti^ue meridian at San Bernardino. 



APRIL 28, 1855. 



c 2 



Reading 



of azimuth circle, telescope directed 



Reading of azimuth circle, telescope directed 





2 i s 



1^1 = 



c "^ o 



^ S C3 



C O CJ 



o a "^ 





on star. 





on signal. 





c <j ^ 

 a> li *- 



S * 3 



s « s 



C h. o 



2 5=" 



*N EC w U 



b^ " 1^ 



^ E o 



fc. 5 o 

 P ^ « 



fc« "3 a» 





Yer. 1 



2 



3 



4 



Ver, 1 



2 



3 



A 



4 



1 







1 

 1 













^ 



< 





A« Tn« s* 



o ; // 



1 



/ // 



o / II 



/ // 



o / // 



• / // 



• / (/ 



• / // 



o / h 



/ tl 



/ // 



21 51 01.4 



b9 59 50 



179 59 35 



269 59 40 



00 45 



91 U 40 181 11 35 



271 11 45 



1 12 05 



1 U 43.75 



1 42 52.45 



30 63.71 



SJ2 01 07.9 



89 59 35 



179 59 40 



269 59 45 



00 15 



91 11 30 i 181 11 27.5 



971 11 40 



1 12 00 



1 11 50.6 



1 42 40.76 



30 50.16 



^ 08 06.9 



89 59 50 



1 



179 59 45 



1 



270 00 02 



00 20 



91 11 30 , 181 11 27.5 



271 11 40 



1 12 00 



1 11 40 



1 42 25.68 



30 45.68 



22 13 51.6 



90 00 05 



179 59 40 



270 00 07.5 



00 25 



91 11 30 181 11 27.5 271 11 40 



! 



1 12 00 



1 11 35 



1 42 08.96 



30 33.96 









ri 



Error of si^ni 



\\ from true n 



neridian yu. o 



f N. — 30' 48' 



^37. 









APRIL 29, 1855. 



o 



-a 



t 



en 



Xi 

 O 



O 



£ 



•1-1 





>, If 



h. 



21 



54 47.1 



22 01 37 



Reading of azimuth circle, telescope directed 



on star. 



I 



Ver. 1 



• / ff 



359 59 15 

 359 59 20 



2 



3 



4 



33 90 03.9 1 00 93 



/ ft 



89 59 10 



89 59 10 



90 00 02.5 1 



179 59 20 

 179 59 15 



269 59 35 

 269 59 35 



160 00 22.5 270 00 32.5 



I 



Readirtg of azimuth circle, telescope directed 



on signal. 



Ver, 1 



• / ft 



1 11 45 

 1 11 45 



2 



o / tt 



91 11 32.5 

 91 11 32.5 



1 11 35 91 11 15 



3 



9 I If 



181 11 42 

 181 11 42 

 181 11 40 



4 



a / ft 



271 11 50 

 271 11 50 

 271 11 45 



Eittwr df slgnffl fftim mrc men 



-^ * .<\ 



E. 01 N.==3#iUi".ai. 



c 



•a 



a 



09 



" .2 



73 





f 



// 









' / 



tt 



1 12 22.37 1 42 49.57 



1 12^.^ 

 1 11 13.87 



i 



1 42 40.00 

 1 41 46.83 



.Is ^ 

 lis 



/ AT 



30 27.20 

 30 17.66 

 dOa3.(« 



