Miscellanies. 169 



obtained by Mr. Walker from the principal observations made at 

 Philadelphia to this time, is 5A. Qm. 39.25. W. With these longitudes 

 as standards, Mr. Paine's chronometric observations give, 



m. s. 

 Boston — Philadelphia by 151 Barraud 16 24.27 going from Boston to Phila. 



682 do. 22.30 do. 



1678 Arnold 24.03 do. 



151 Barraud 23.33 returning from Phila. to Boston. 



682 do. 23.60 do. 



1678 Arnold 23.76 do. 

 Philadelphia — Capitol by 151 ^ 



682 V Mean 7 26.43 going from Phila. to Capitol. 

 1678) 

 151^ 



682 \ Mean 7 26.50 returning from Capitol to Phila. 

 1678 5 



1h» Qftt St Tit S. It TTtt S 



Hence, longitude of Capitol =4 44 16.6-1-23 50.01=5 8 6.61 

 = 5 39.2-f 7 26.46=5 8 5.66 



Mean =5 8 6.14 



Mr. Walker, in a paper read before the Society, March 2, 1838, 

 from a discussion of all the observations then made at Washington, 

 finds the longitude of the Capitol 6h. 8??i. 7s. W., a value which is 

 probably not far from the truth. 



Thus we have an additional proof, if any were needed, of the error 

 of 25 seconds in time of Lambert's longitude of the Capitol, reported 

 to Congress, and adopted by that body. 



The coincidence between the interval from Boston to Philadelphia, 

 viz. 



m. s. 

 By celestial phenomena, 16 22.60 

 By chronometers, 16 23.55 



shows that the error of either is reduced within narrow limits. 



The Mansion House, Northampton, Mass., lat. 42° 19' 4.6" N. by 

 327 altitudes of northern and southern stars, has the following longi- 

 tude : — 



m. s. 



Boston — Northampton, 6 17.72 by 74 chronometers. 



do. 6 17.89 by immersion t Sagittarii. 



Northampton — Phila. 10 4.06 by do. 



This immersion of t Sagittarii was observed, Aug. 22d, 1836, as 

 follows : — 



h. m. s. 

 By R. T. Paine, at 10 14 57.46 at Mansion House, Northampton. 

 By W. C. Bond, at 10 23 20.90 at his Observatory. 



By S. C. Walker, at 10 1 7.30 at N. 4.4", W. 1.06^. of State House, Phil. 

 Vol. xxxviii, No. 1.— Oct.-Dec. 1839. 22 



