108 



Comparison of Bessol's elements of the spheroid, from the mean often sur- 

 veys hitherto executed (See Astr. Nachr. No. 333), with those derived by Mr. 

 Borden from his triangulation, combined with Mr. Paine's differences of lati- 

 tude and longitude. 



ELEMENTS. 



Equatorial radius in English feet, 

 „ „ miles, 



Semi-polar axis ,, feet, 



„ „ miles, 



Degree of meridian for middle lati- ) 

 tude, 42° 21' 30" in feet. $ 



Degree perpendicular to meridian, do. 



Degree of the parallel, do. 



Latitude of southernmost point, ) 



Nantucket, } 



Latitude of northernmost point, ) 



Newburyport, J 



Valuo9 from 

 Bcssel's 



Elements. 



20922811.640 

 3962.653 



20853232.370 

 3949.476 



364393.550 



365723.230 

 270249.750 



41° 16' 57'!02 

 42 48 3L98 



Borden's Values 

 from the 



Massachusetts 

 Survoy. 



20914728.000 

 3961.123 



20854128.000 

 3949.646 



364356.000 



365511.330 

 270092.120 



41 16 56\62 



42 48 3215 



Dis- 

 crepancy. 



1.53 



0.17 



37.55 



212.10 

 157.63 



0"40 

 017 



