ASTRONOMICAL PAPERS, 



"5 



comparing the few places where there was any difference, 

 which fcarce ever went farther than the laft decimal place. 

 Mr. M'Clean and Mn Lukens took the trouble to bring out 

 their work by multiplying each diftance by the natural Sine 

 of the courfe, to the radius unity, for the departure; and 

 by the cofine for the latitude. Mine was done by Ro- 

 bertfon's tables. The whole follows, and wc think it may 

 be depended on for correftnefs. 



Courfes and Dijl mice s from Norriton obfervatory to the ob- 



fervatory in the State^Houfe Square^ Philadelphia^ and 



from thence to the obfervatory of Meffrs. Mafon and 



Dixon, at the fouth point of the city of Philadelphia; 



taken July 3^ and j^th, 1770; JVith the di^erences of 



longitude and latitude'^ hetvoecn the faid obfervatories, 

 thence deduced. 



2; 



o 

 o 



n 



Magnetic 

 Courfes. 



S. 



o 



27 



68. 



3;S. 



4 



S 

 6 



7 

 8 



9 



10 



S. 



s, 

 s. 



s. 

 s. 

 s. 



66. 



80. 

 70. 

 68. 



7a 

 50. 



ocy w. 



00 £. 



00 E. 

 00 E. 



00 E. 



ao E. 



30 E. 

 16 E. 

 00 E. 

 00 E. 



DIftanccs 

 chains. links! *Northing. 



13,00 



11,00 



8-^9 



17.77 

 1 0,00 



a^joo 



60,00 



a6,oo 



69,00 



oo,M47 



Southing. 

 11.5831 



4,iao7 



7.X177 



1,7365 



7,4040 



ai,99oo 



7>9'^*4 



*3»5993 

 14,9971 



Eafting. 



10,1990 

 8,^887 



16,1337 



9,8481 

 ao,7i66 



ssMso 



64,8388 

 15*4894 



Wcfting, 

 5,9018 



Sums in aoc oiirfes.| 



00 E. 



00,1447 



18S. 



t9;S. 



20' S 



Sums in ao couiics, I 47'-^>"9 



00,1447 I af>7, 6.^70 I 



5.3B09 



33>5848 

 12,8971 



7."75 

 _i,t6i>q 



341, 4^V? 



«4 



■ • n 



Sf9<^i^ 



2,9396 



1 "8,84x4 



No. 



*The NonKIng, Southing, EiJlJng and Wcfting, are in chains and decImaU of a chain, 

 to the ten thonfaiuUh part; or may he read chanis and links, calling the two Uh handfi^urcs 

 •f the decimal, links, and the two other iigurcs hundredth parts of links. 



V 



■* 



J 



