4 | a INES 
EQUAL MAGNETIC DECLINATION 
IN 
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Coast Survey Report § ae 1876. eo 
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This chart of the declination of the magnetic needle for variation of the 
compass) has been constricted princtpally from the observations made by 
the United States Coast Survey up to 1877, and those made at the charge 
ah by TE: 
of the Bache Fund ef the National Academy of Sctences, ¢ 
Hilgard, between 1872 and 1877. In addition to these, th 
e U.S.Engineers in connection with the Surveys of 
Northwestern and Narthern Boundaries have been used; also thase made 
direction of the U.S. Land Officein tracing aeverae boundaries of 
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