18 



ASTRONOMICAL OBSERVATIONS 



December 14, 1853. Circle West. 



Object. 



t Urs. mill. 

 € I. 

 € U. 

 Tauri 

 6 Ononis 

 f Tauri 

 a Ononis 

 fi Geminor 



p. R. 



Mean of wires. 



4'' ogm OP. 7 



4 18 17.9 



20 30.1 

 26 12.8 

 31 56.6 

 36 14.8 

 54 34.4 



21 22.5 



R. 



1^9 



0.4 



0.0 



0,9 



1.9 



2.6 



5.6 



+ 10.0 



Cc. 



— 10^4 



+ 1.5 

 1.5 

 1.5 

 1.4 

 1.5 

 1.4 

 1.4 



Mean + iJ + Cc. 



16i» 08" 49«.4 



16 18 19.0 



16 20 31.6 



16 26 15.2 



16 31 59.9 



16 36 18.9 



16 54 41.4 



17 21 34.0 



6" OO" 55 ".9 



52.2 

 33.2 

 55.4 

 16.2 



07.7 



T = 161^ 20"'.5 J^o = + 12^ 52"' 40» 



The normal equations : + 6f+ 7.1a+ 9.3 6 = — 58.2 give a = 5^0 



+ 7.1 f + 10.2 a + 18.3 6 = — 102.0 6 = _3.3 



+ 9.3 J + 18.3 a + 50.3 6= — 245.1 £ = + 1.3 



Object. 



CI. 

 <L11. 

 o Tauri 

 6 Orionis 

 f Tauri 

 a Orionis 

 /i Geminor 



16h 18m 129.5 



16 20 25.1 



16 26 08.7 



16 31 54.2 



16 36 124 



16 54 354 



17 21 27.5 



Differences. 

 (Very near full moon.) 



-Ot 7m 56s. 2 

 -0 13 41.7 

 — 17 59.9 

 -0 36 22.9 

 -1 03 15.0 



—Oh 5"i43s.6 

 — 11 29.1 

 — 15 47.3 

 — 34 10.3 

 — 1 01 02.4 



5h I8m52s.2 

 5 24 33.2 



5 28 55.4 

 47 16.2 



6 14 07.7 



Deduced sid. time of 

 moon's limb. 



ah 10m 53^.8 



10 56.0 

 10 51.9 



5 10 .55.5 

 5 10 53.3 



5h 13m 06 s. 

 5 13 08.6 

 5 13 04.1 

 5 13 08.1 

 5 13 05.9 

 5 13 05.3 



December 15, 1853. Circle West. 



Object. 



Polaris R. 

 t] Urs. maj. s. p. 

 ■^ Bootis s. p. 

 o Arietis R. 

 a Bootis s. p. 

 y Ceti 



fi Urs. miu. s. p. R. 

 o Tauri 

 f Tauri 

 a Orionis 

 y Draconis s. p. 

 € II. 

 ft Geminor 



Mean of wires. 



12'' 07m 22^.7 



12 45 

 12 51 



57 5 

 47.9 

 1 02 57.0 

 1 13 01.4 

 1 39 39.0 

 1 55 20.5 

 4 22 18.7 



32 19.9 



50 37.4 



56 42.7 



09 56.5 



17 24.8 



R. 



-24^.7 



—18.3 



—17.5 



—15.6 



—13.9 



— 9.6 



— 7.0 

 + 17.1 

 + 18.9 

 + 21.8 

 + 22.7 

 + 24.9 

 + 26.1 



Mean + JJ+Cc. 



12'' 07" 



12 45 



12 51 



13 02 

 13 12 

 13 39 

 13 55 

 16 22 

 16 32 

 16 51 



16 67 



17 10 

 17 17 



52^.6 



37.0 



29.0 



42.9 



46.0 



30.8 



08.2 



37.3 



40.3 



00.6 



03.2 



22.9 



52.4 



1'' 06° 



41 



47 

 58 

 08 

 35 

 51 

 18 

 28 

 47 

 53 



18^.4 



45.1 



42.2 



56.6 



58.3 



44.1 



07.7 



52.3 



55.4 



16.2 



10.3 



6 14 07.8 



T = 14'' 38'''.0 -2^0 = + la*" 56'" 15' 



A preliminary discussion showed that the result from Polaris was accordant with the results from 

 the other stars; the whole group gave the following normal equations : — 



+ 12 £ + 10.87 a — 35.65 6= + 94.1 o = — 22^.9 i? = + 12'' 56'" 37M 



+ 10.87 t+ 13.9 a+ 38.4 6=— 168.1 6 = — 2.26 



— 35.65 f + 38.4 a +1497.5 6 = — 5072.0 t = + 22.1 



