MAGNETIC TERM-DAY OBSERVATIONS 



MAGNETIC OBSERVATORY ON FOUR-AND-A-HALF STREET WEST, NEAR AND NORTH 

 OF PENNSYLVANIA AVENUE, WASHINGTON, D. C. 



Latitude 38 53' 31". Longitude 77 00' 44" (5A. 8m. 3s.) W. of Greenwich. 



DIFFERENTIAL OBSERVATIONS OF DECLINATION IN 1853. 



The instrument used was declinometer 20, United States Coast Survey No. 2 ; magnet C. 15 

 suspended. Increasing telescopic scale readings denote a westerly movement of the north end 

 of the magnet. 



MARCH 33 and 34, 1853. 



