—S 
A 
Miscellanies. 169 
obtained by Mr. Walker from the principal observations made at 
Philadelphia to this time, is 5k. Om. 39.2s. W. With these longitudes 
as standards, Mr. Paine’s chronometric observations give, . 
m. - 8. 
Boston—Philadelphia by 151 Barraud 16 24.27 going from Boston to Phila. 
682 d 22.30 do. 
~_ 0. 
1678 Arnold 24.03 do. 
151 Barraud ap returning from Phila. to Boston. 
y do. 
2 Oo. i 
4 1678 Arnold a ee do. 
Philadelphia—Capito} by 151 
682 Mean 7 26.43 going from Phila. to Capitol. 
1678 
151 
on _ Mean 7 26.50 returning from Capitol to Phila. 
<i. 8. me Shy ae as 
Hence, longitude of Capitol =4 44 16.6123 50.01=—5 8 6.61 
=5 O 39.247 2646=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 5h. 8m. 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. 
ey Res The coincidence between the interval from Boston to Philadelphia, 
? ee 
a? pee, Se 5 im. ~~ 8, 
“e te By celestial phenomena, 16 22.60 
ta es By chronometers, 16 23.55 
“es 3 
shows that the error of either is reduced within narrow limits. 
The Mansion House, Northampton, Mass., lat. 42° 19’ 4.6” N, by 
927 altitudes of northern and southern stars, has the following longi- 
e > 
4 m. Ss. 
_ 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, ™,  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. 1.06s. of State House, Phil. 
Vol. xxxvm, No. 1.—Oct—Dec. 1839. 
* es 
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