AZIMUTHS. 



189 



9. — Azimuths Joy laying off the prime vertical, d'c. — ContiiiueJ. 



Ohservatlons at the intersection of the paralld 31° 20' aiid the lllth^ of longiiude west 













JUNE 15, 1855. 









observation 

 hronometer 

 sidereal. 



1 



Heading of azimuth cir- 

 cle, telescope directed 

 on star. 



1 



Reading of azimuth cir- 



r 



cle, telescope directed 

 on signal. 



Mean difference of 



readings at each 

 ObBervation. 



■-sis 



< 



h. ^ U 



F 2 ta 



g :: « 



Kem arki. 





.5 J3 CM 



Ver. 1 



2 



1 



1 



Ter. 1 



2 





h. m. s. 

 21 22 10.5 



r fr 

 312 10 50 



: 1 

 • t tl \ 



: 132 10 55 



309 52 15 



• / // 



129 52 20 



• r If 

 2 18 35 



• / It 



1 41 52.7 



3S 42.30 



1 



Chronometer 2419 fart 2A. 54m. 25*. 





21 27 23.5 



312 11 15 



j 132 U 05 



309 52 15 



120 52 20 



2 18 93 



1 42 12.35 



36 39.65 ^ 



Asimnth of «igna! hy a m^an of ton oh?f 



^rvttion 



21 44 22.5 



312 11 45 



i 132 12 10 



309 52 10 



129 52 30 



1 



2 19 37.5 



] 



1 42 54.27 



36 43.24 



on IVldrii! EMCof Iforth, 'Jd' 55". 59. 





21 50 58 



312 12 10 



132 12 25 



1 309 52 10 



129 52 30 



2 19 57.5 



1 43 01.29 



36 55,21 







21 55 48 



312 12 15 



132 12 20 



309 52 10 



129 52 30 



1 



2 19 57.5 



1 43 03.24 



39 54.9S 







21 58 47 



312 12 40 



132 12 20 



309 52 10 



129 52 25 



2 20 15 



1 43 03.07 



37 11.93 







22 06 46 



312 12 00 



i;>2 12 20 



309 52 10 



129 52 25 



9 19 52.5 



1 42 57.41 



36 54.04 







22 10 38 



312 11 55 



1^ 12 10 



309 52 10 



1 



129 52 25 



2 19 45 



1 43 59.05 



36 52.95 ' 







22 19 06.5 



3ia 12 00 



132 12 15 



309 52 10 



129 52 25 



2 19 50 



1 42 34.03 



37 15.97 







22 25 07 



312 11 30 



132 11 45 



309 52 00 



129 52.30 



2 19 22.5 



1 42 16.13 



37 06.37 







Result June 14th 37 DC. 35 



Result June 15th •.,« 36 55.59 



Azimuth of signal by a mean of two nights' obsen'ations on Polaris 36 57.97 



10. — Elements for marking parallels of latitude 31° 20' and 31*^ 47' 



PARALLEL 31' 20'. 



Distances from point 

 of beginning (on 

 tangent.) 



Miles. 





 1 

 5 



10 

 15 

 20 

 25 

 30 

 35 

 40 

 45 

 50 

 55 

 60 

 64 



+9 

 100 



72 ft. ! > 















0.8 

 1.2 

 1.7 

 2.6 

 4.3 

 6.0 

 7.7 

 10.3 

 13.8 



16.6 

 62.4 



Length of offset from 

 tangent (= difference 

 of latitude.) 



In arc. 

 /; 



0.000 

 0.004 

 0.100 

 0.401 

 0.903 

 1.604 

 2.506 

 3.609 

 4.913 



6.417 



8.121 



10.026 



12.131 



14.437 



16.523 

 40.115 



In feet 



000 



0.4 



10.1 



40.5 



91.1 



162.0 



253.2 



364.6 



496.4 



648.4 



820.5 



1013.0 



1225.7 



1458.7 



1669.3 

 4056.2 



I 

 Latitude of points Azimuth of tan- 'Longitude of points 



gent at several j fitx wiUes apart on 



points bearing the parallel of 



on tangents 



31 20 00.00 

 00.00 

 19 59.90 

 dd.60 

 69.10 

 58.40 

 57.50 

 56.39 

 K.09 

 53.58 

 51.88 

 49.97 

 47.87 

 45.56 



43.48 

 19.89 



North East. 



• II 

 90 00 00.0 



89 59 43.3 



57 21.7 



54 43.4 



52 05.0 



49 26.8 



46 48.5 



44 10.2 



41 32.0 



38 53.7 



36 15.9 

 33 37.2 



30 58.9 



21.6 



96 W.2 

 07 15.0 



31* 20\ 





00 00.00 



1 00.88 

 5 04.413 

 19 08.816 

 15 13.94 

 dO 16.75 

 95 9B.06 

 30 26.48 



35 ao.a9 



40 35.33 

 45 39.70 

 ^ 44.13 



55 48.54 



1 00 52.96 



1 05 07.69 



1 41 28.26 



