68 



ON THE LONGITUDE OF 







W02 













+^3 











Observer. 



a; 3 oj 



Beginning. 



Formation 

 of Ring. 



Rupture of 

 Ring. 



End. 







5^1 













atifr 

 Ho 



g Iffi 













>A 



J 

















h. m. 



li. m. 



h. m. 



h. m. 



E. J. Bean 



+ 70"-0 



s. 

 — 1-70 



3 13 



4 31 



4 35 



5 45 







28-4 





Wm. Penn Cresson 



+ 1-8 



— 5-20 







27-8 





Prof. W. R. Johnson 



+ 1 -8 



— 5-20 



10-7 





23-5 



12-2 



George M. Justice 



+ 10 -0 



— 2-86 



7-4 



12-8 



27-3 



11-3 



E, 0. Kendall 



+ 10 -0 



— 2-86 



8-3 



10-9 



28-4 



12-9 



Joseph Knox 



+ 21 -0 



+ 1-39 



12-8. 









Isaiah Lukens 



+ 9-0 



— 0-86 





21-7 







Thomas M'Euen 



— 0-4 



— 2-33 



3-0 



18-1 



29-1 



13-2 



Prof. Roswell Park 



+ 6-5 



— 1-30 





19-1 



29-1 





Dr. R. M. Patterson 



+ 1 -1 



— 1-20 



7-0 



19-1 



30-1 



16-1 



Wm. H. C. Riggs 



— 0-4 



— 2-33 



7-3 



16-3 



29-4 



7-8 



Samuel Sellers 



+ 7-5 



— 0-05 



60 



16-0 



31-0 



16-0 



Tobias Wagner 



+ 10 -0 



— 2-86 



61 









Sears C. Walker 



+ 10 -0 



— 2-86 



5-6 



15-6 



28-0 



13-0 



|William Young 



— 21 -0 



+ 1-39 





12-9 





15-0 



It was considered most convenient to reduce the above local times to the 

 State House, M'hich has been done by means of the formulse in the Journal of 

 the Franklin Institute, vol. xx. p. 125, by which I have deduced the following 

 values of the variation of the local time of the several phases for a small dif- 

 ference of terrestrial latitude or longitude. 



Beginning. Ring. End. 



. , =_ 0.0397 —0.0382 —0.0343 

 + or East Is. of terr. Ion. in time . = + 1.2600 + 1.1400 + 0.9925 



Variation for + or North 1" of terr. lat. 



Applying these values, and taking means after giving due weight to each 

 observation, the results for the State House are obtained as stated below. 



The method used in making these reductions is that of Bessel. Astr. Nach. 

 No. 321. The sun's semi-diameter there given has been employed; the other 

 elements have been taken from the Nautical Almanac. Bessel's semi-diameter 

 of the sun is less than that of the Nautical Almanac by 1M12. I have com- 

 puted the following co-ordinates for this eclipse, and would remark that the 



