of Several Places in the United States. 
343 
At Baltimore, at a place about 100 feet S. S. W. of the Battle 
Monument. 
For the Latitude, 
1831, Dec. 23d. Observed 10 altitudes of the Sun upon or near the 
meridian ; resulting latitudes, 
39° 16’ 94.5”; 44.5”; 70.3”; 66.2”; 77.4”; 62.4”; 
69%4-- Sele 
Mean of the 10 observations ' 
Dec. 25th. Observed Sun’s meridional alt. ; saan lat. 
“26th. Observed Sun’s meridional alt. ; resulting lat. 
Mean of the 12 observations 
Therefore, the latitude of the Battle Monument is 
For the Longitude. 
Chronometer fast of mean time at Baltimore, Dec. 24th, 
89.7”; 65.3” 
39° 17’ 11.3” 
9.5 
24.1 
39 17 12.3 
39.847 13. 
sec, 
0-21 47.7 
Chron. fast of mean time in F street, Washington, same day, 0 23 28.1 
Difference of meridians 
Longitude of the house in F street, opal lon 
Longitude of Baltimore 
2dly. Chro. fast of mean time at Philadelphia, Dec. 29th. 
Chronometer fast of mean time at Baltimore, the same day, 
Difference of meridians 4 a 
Long. of Philadelphia (No. 102, Chants street, near 3dstreet) 5 
Longitude of Baltimore ; . 
. O 1 40.4 
Se Selo 
5M Gy31.9 
0 16 13.4 
0 22° 1.2 
0 5 47.8 
0 43.0 
5 6 30.8 
The mean of the two (5h. 6’ 31. 30" may be fiten as the longitude of the 
Battle Monument. 
At Brooklyn, 5000 feet South, 1 statute mile East, of the City Hall, 
New York. 
For the Longitude. 
Chronometer fast of mean time by Transit clock, Jan. 9, 1832, 
Chronometer fast of mean time at Philadelphia, the same day 
Difference of meridians 3 
12 25 
16 47.0 
4 44.5 
