THE MAGNETIC DECLINATION IN CALVERT 



COUNTY 



BY 



L. A. BAUER 



Magnetic observations for the purpose of determining the magnetic 

 declination of the needle, or the " variation of the compass/' have been 

 made by the Maryland Geological Survey and the United States Coast 

 and Geodetic Survey at the following points within the county. 



TABLE I. 

 Magnetic Deci-ixations Observed in Calvert Codnty. 



All values refer to mean of day (24 hours). 



Since January 1, 1900, the value of the magnetic declination has 

 increased annually by about three minutes (3'), so that on January 1, 

 1907, for example, the north end of a compass would bear at the south 

 meridian stone at Prince Frederick, about 5° 45' W., on the average for 

 the day. 



DESCRIPTION' OF STATIONS. 



Prince FredericTc. — The station of 1896 was superseded by the 1900 

 stations, which are as follows: 28A is the south monument of the 

 meridian line established in the court-house square in 1900, this monu- 

 ment being 13.8 feet from the south fence and 33.3 feet from the east 

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