42 



REPORT ON 



Circle readings. 



Transit of sun's 





Vernier . . 

 Vernier . . 



Mean . . . 

 Vernier . . 



75° 36' 

 75 6 



0" 

 3° 



i st limb 

 2d limb 



Mean 



8 h I? m 

 l8 



29 s 

 38 



T3 

 <u 



> 



u 



Oh 



75 21 

 12° 28' 



15 

 0" 



8 18 



3-5 



Reading of magnet. 



O 



<u 



H 



(1) Scale inverted 



(2) Scale erect 



(2) — (l) = A 



8i a -3 

 77.2 



— 4-i 



Value of one division of magnet scale = 2'. 349. 



The telescope is direct when the vertical circle is on the left-hand side. 



These observations were made before noon, and time was noted by chronometer 

 Fletclier, 906, which was l h 41 m 22\2 fast of local mean time. 



At the time the azimuth was observed, the reading of the horizontal circle, tele- 

 scope direct, to distant referring mark was 10° 23' 30". 





Telescope direct. 



Telescope reversed. 



Equation of time .... 

 s 



h 2 m 47s.! 



— 5 23 37.1 



— 80° 54' 16" 

 + 21 47 18 



o h 2 m 47 s .i 



— 5 20 31.6 



— 8o° 7' 54" 

 + 21 47 !9 





Tan S 



9.60177 

 0.80111 



9.60178 

 0.76602 



Tan M 



0.40288 



0.36780 





+ 16° 5°' 3" 

 4- 68 25 21 



+ 16° 50' 3" 

 + 66 47 35 



M 



(.* — M) 



— S 1 35 18 



— 49 57 32 



* Tan t 



Cos M 



Cosec (t — M) 



0.79562 



9-56557 

 0.10592 



o-75955 

 9-59556 

 0.1 1600 



Tan^ 



0.46711 



0.47111 



Circle reading to magnet . 

 4X^ scale division . . '. 



12° 2 3 '.5 

 — . 2-7 



25 1 9-9 



12° 28/0 



— 4-8 

 251 19.6 



180° + circle reading to sun 



263 30.7 

 255 IO -5 



263 42.8 

 255 21.3 



Magnetic declination . . . 



8 20.2 E. 



8 21.5 E. 



Observations of Vibrations were made as follows: The instrument having been set 

 up and adjusted in the manner already explained, the long magnet, C. 32, was 



