The Variation of the Needle. 



TABLE OF THE VARIATION OF THE NEEDLE. 

 For use in the Land Office at Pierrepont Manor in Jefferson 

 County, New York, in Lat. 43° 43' 45" N., and Long. 75° 56' 57" W.; 

 and to apply to Great Tracts Nos. 4, 5 and 6 Macomb's Purchase, 

 which were surveyed and allotted from 1795 to 1803. 



Made 1823, September 18, and 1856, November 25 : 



By William C. Pierrepont, 

 Variation : Yearly, 5' 14". 4367: Daily, 0". 86107* 



A large amount of additional data has been used in the preparation 

 of the map of the isogonic lines, but this data is not, as yet, available 

 for publication. 



