392 



REPOltT OF THE COMMITTEE ON THE 



which are the most plausible values of the correctious of the tabular 

 elements that I am able to deduce from Rumker's expressions for the 

 conjunction-times. I have given the method of solution somewhat 

 at length, in order that every one may judge w^hether other modes of 

 combining together the equations of condition might not give more 

 probable results. 



With these corrections, and using the longitudes of observatories as 

 given in Rumker's letter, the Greenwich mean time of conjunction 

 is as follows : 







CODJI 



inction-time. 







Conjunctk 



h. m. 



m-time. 





',. 



m. s. 



S. 



By Altona, 



Beg. - 



- ^ 



6 59-88 



By Copenhagen, 



B. - 



- 2 



7 



3-35 





End, - 



. 



66-03 



By Bremevhafen, 



E. - 



- 





4-91 



By Berlin, 



B. - 



- 



61-11 



By Manheim, 



E. - 



- 





3-81 





E. - 



- 



69-86 



By Edinburgh, 



E. - 



- 





4-18 



By Brussels, 



B. - 



- 



62-26 



By Greenwich, 



E. - 



- 





5-06 





E. - 



- 



65-26 



By Stettin, B, 



,E. - 



- 





3-24 



By Hamburg, 



B. - 



- 



65-58 



By Tranby, B. 



,E. - 



• 





6.24 





E. - 



. 



71-52 i 



ByNeumiihlen, B. 



,E. - 



- 





7-95 



By Hanover, 



B. - 

 E. - 



- 



64-12 

 58-73 



Mean of 8 results. 





- 2 



7 



4-84 



By Konigsberg, B. - 



- 



61-30 



Mean of 24 results 



- 



- 2 



7 



5-25 





E. - 



- 



62-99 













By Ormskirk, 



B. - 

 E. - 



- 



64-25 

 75-46 













By St Fernan 



do, B. - 

 E. - 



- 



74-29 

 64-65 













Mean of 16 results. 



- 2 



7 5-45 













This conjunction-time gives the following longitudes from Green- 

 wich, of the American places of observation ; to which I have also 

 appended the results which I have already published in the Journal of 

 the Franklin Institute for August 1838, and which are obtained by 

 using Bessel's method, with Peters's co-ordinates for the end, and 

 mine for the beginning of the eclipse. The corrections of the tabular 

 elements being those obtained by Dr Peters, viz., e = — 3-"650, 

 ? = — 5-M72, n = 0. 



Washington Capitol, 



Haverford school, Delaware Co., Pennsylvania, 

 Germantown, C. Wistar's private observatory, - 

 Philadelphia State House, . . . . 



West Hills, coast survey, - . - - 



Southwick, Mass., A. Holcomb's private observatory, 

 Providence, Brown University, ... 



Dorchester, Mass., W. C. Bond's private observatory. 



Walker, from Rum- 



Walker, from Peters's 



ker's Equations. 





Co-ordinates. 



h. m. s. 



h. 



TO. 



5. 



5 8 13-83 



5 



8 



13-45 



5 1 16-53 



5 



1 



15-05 



5 40-61 



5 







40-94 



5 38-89 



5 







39-60 



4 53 41-11 



4 



53 



42-05 



4 51 12-89 



4 



51 



13-25 



not reduced. 



4 



45 



38-33 



(( 11 



4 



44 



16-92 



