70 



ON THE LONGITUDE OF 



Then, according to Bessel, calling d the longitude + East, — West of Green- 

 wich, we have 



d = d' -{■ ui + bl -\- c-n 



Where 



d' = the resulting longitude, uncorrected for the errors of the tables 

 £ = the correction of the tabular place of the moon on its orbit 

 I = "^ *' " on a perpendicular to its orbit 



•*) = " " sum of the semi-diameters of the sun and moon 



'l' — " " difference " " 



With these elements and co-ordinates I have computed the following values 

 of d' and the co-efficients a, h, c, assuming the ellipticity of the earth to be 

 0.00324. 



Place of Observation 



Mean Time of 





7/ 





7 





d 



and Observer. 



Observation. 





d' 



a 



b 



c 







h. r,i. 



A". 



h. 



711. S. 









h. TO. s. 



Western Reserve Coll. C 



B. 



2 38 



17-02 



— 5 



25 3-59 



+ 2-203 



— 0-355 



4- 2-232 



— 5 25 40-70 



Prof. Loomis. \ 



E. not obsei 



ved 

















B. 



2 39 



38-82 



~ 5 



25 15-71 



+ 3 



203 



— 



372 



-f 2-235 



— 5 25 52-71 



Dover, Ohio, 

 /. £licke7isderfer. 



F. R. 



4 



25-71 





20-28 



+ 2 



204 



— 



848 



+ 2-361 



45-44 



R.R. 



4 6 



9-63 





23-67 



-1-2 



204 



+ 



302 



— 2-224 



59-60 





E. 



5 18 



3-64 





35-04 



+ 2 



204 



— 



151 



— 2-209 



59-45 





B. 



3 5 



52-00 



— 5 



7 46.94 



+ 2 



203 



— 



298 



+ 2-223 



— 5 8 24-44 



Alexandria, D. C, 

 B. Hallowell. " 



F. R. 



4 24 



60 





7 58-40 



-1- 2 



204 



— 



093 



+ 2-205 



29-16 



R.R. 



4 30 



13-0 





7 45-26 



+ 2 



204 



— 



345 



— 2-229 



16-46 





E. 



5 39 



25-0 





8 14-22 



+ 2 



204 



— 



131 



— 2-208 



.38-79 



Washington Capitol, [ 

 R. T. Paine and < 

 Lieut. Gillis, U. S. N. 



B. 



3 6 



9-23 



— 5 



7 25-73 



+ 2 



203 



— 



294 



-f 2-223 



— 5 8 3-25 



F. R. 



4 24 



27-61 





31-39 



+ 2 



204 



— 



014 



+ 2-204 



2-73 



R.R. 



4 30 



18-05 





31-96 



+ 2 



204 



— 



405 



— 2-24t) 



2-73 





E. 



5 39 



54-76 





37-42 



+ 2 



204 



~0 



134 



— 2-208 



1-96 



Haverford School, Pa., 



B. 



3 12 



17-59 



— 5 



34-07 



4-2 



203 



— 



231 



+ 2-216 



— 5 1 12-03 



/. Gummere ^' < 

 -S". /, Gummere. 



F.R. 



4 30 



29-63 





32 43 



+ 2 



•204 



4- 1 



412 



-1- 2-617 



13-98 



R.R. 



4 34 



44-80 





53-95 



+ 2 



204 



— 1 



961 



— 2-949 



13-71 



E. 



5 44 



•28-24 





53-43 



+ 2 



204 



— 



165 



— 2-210 



17-73 



Philadelphia, 

 State House, < 



B. 



3 13 



10-06 



— 4 



59 59-81 



+ 2 



203 



— 



229 



+ 2-215 



— 5 37-79 



F.R. 



4 31 



18-76 



— 4 



59 57-12 



+ 2 



204 



4- 1 



420 



4- 2-621 



38-72 



Several Observers. 



R.R. 



4 35 



31-35 



— 5 



20-44 



+ 2 



204 



— 1 



965 



— 2-952 



40-16 





E. 



5 45 



15-46 



— 5 



1501 



+ 2 



204 



— 



164 



— 2-210 



39-32 



Germantown, Pa,, j 



B. 



3 12 



54-9 



— 5 



3-00 



+ 2 



203 



— 



228 



+ 2-215 



— 5 40-99 



Charles Wister Sf < 

 Casper E. Wister. 



F.R. 



4 31 



8-9 



— 4 



59 58-59 



-f-2 



204 



4- 1 



501 



+ 2-665 



40-75 



R.R. 



4 35 



18-4 



— 5 



19-83 



+ 2 



204 



— 2 



070 



— 3-023 



38-83 





E. 



5 45 



7-9 



— 5 



12-56 



4-2 



204 



— 



166 



— 2-210 



36-06 



Burlington, N. J., 

 Prof. Hamilton. "^ 



B. 



3 14 



23-7 



— 4 



58 46-65 



4- 2 



303 



— 



220 



+ 2-214 



— 4 59 24-69 



F.R. 



4 32 



32-6 





58 4513 



4- 2 



204 



4- 1 



743 



-f 2-810 



28-99 



R.R. 



4 36 



19-6 





59 12-50 



4-2 



204 



— 2 



350 



— 3-222 



29-55 



- 



E. 



5 46 



8-5 





59 0-07 



4- 2-204 



— 0-168 



— 2-210 



30-35 



