94 



THE GREAT COMET OF 1858 



The following remarks must be made with regard to the composition of these 



normals. 

 June 14. The right ascension is the mean of four Berlin observations ; the rest are 



so discordant that no confidence can be placed in them. 



July 13. This normal is formed from the Berlin, Cambridge, and Ann Arbor obser- 

 vations, the others being rejected. The Washington observations, although more 

 concordant at this time than they are generally, yet differ from the observations 



has proved impossible to satisfy 



which should be considered the best, and on 

 them along with the other normals. 



Oct. 19. The right ascension of this normal has proved most refractory 



formed from all the material, it could not 



when 



not possibly be represented within 2". 5, and 

 much experimenting showed that a curve drawn through the adjacent normals would 



this one distant fi 



by about 



quantity. This difference seeming 



gether too large to be admitted in a normal having so much weight, some means must 

 be adopted for ameliorating it. 



As a more careful scrutiny of the observations showed that those made with small 

 telescopes, especially those made at the Cape with the small instrument, had produced 

 this deviation, I reluctantly set them aside ; and the right ascension given above is 

 the result of the Berlin, Bonn, Cambridge, U. S., and Ann Arbor observations. 



By subtracting the reductions 



S- 



below we obtain the 



ordinates of the 



comet referred to the mean equinox and equator of 1858.0, and freed fr 



bations 



pertu 



Aberration. 



Reduction from 1858.0. 



PerturbationB. 



1858. June 14 



July 13 



11 



23 



Sept. 5 

 Sept. 17 

 Sept. 28 



Aug. 

 Aug. 



Oct. 



1859. Jan. 



8 



Oct. 19 



Nov. 1 



Nov. 16 



Dec. 1 



Dec. 16 



3 



Jan. 30 

 Feb. 26 



//a 



2.20 

 8.58 

 13.36 

 15.79 

 20.37 

 28.74 



35.41 



27.95 



22.57 



20.43 



21.23 



23.27 



26.29 

 30.51 



J 8 



5.26 



4.72 



5.78 

 6.25 

 5.51 

 0.22 



38.30 +15.97 



38.05 

 30.56 

 15.90 

 9.26 

 6.56 

 5.43 

 5.16 

 6.31 



J 



a 



-J-31.32 

 37.80 

 43.55 

 45.52 

 47.12 

 47.06 

 43.23 

 40.05 



48.53 

 60.30 

 69.54 



82.19 

 88.00 

 94.21 



JS 



n 



3.43 

 5.93 

 9.07 

 10.68 

 12.86 

 15.65 

 18.90 

 19.27 



8.58 

 3.84 



76.45 + 0.11 



3.83 



8.24 



14.70 



A 



a 



0.86 

 0.51 

 0.26 

 0.16 

 0.10 

 0.04 

 0.00 

 0.01 



14.35 +0.04 



0.52 

 1.11 

 1.53 

 1.79 

 1.92 

 1.72 



35.09 +8.86 +96.56 +20.85 +0.90 



J8 



0.71 



a 1858.0 



14°1 23 58.89 



0.47 144 32 9.95 



0.28 151 16 28.43 



0.19 155 30 56.23 



0.12 162 9 10.92 



0.05 172 46 39.35 



0.00 192 7 55.01 



0.42 250 26 45.22 



1.17 269 33 32.63 



1.41 281 47 36.36 



1.43 290 36 38.91 



1.38 298 21 13.38 



1.23 307 14 3.32 



0.94 320 35 44.14 



0.61 334 38 58.21 



S 1858.0 



o 



+25 



0.02 221 12 55.39 +10 



4 54.66 



27 48 5.90 



30 57 29.50 



32 43 35.83 



34 58 46.30 



36 27 48.51 



32 26 26.67 



23 43 41.07 



41 1 21.15 



48 4 58.64 



51 24 36.67 



53 28 51.09 



55 21 40.18 



58 21.27 



61 13 39.30 



