64 



From the calculated differences in the value of these meridional 

 degrees, it was apparent to Mr. Borden, that the increase of 57 feet to 

 the degree, which he had adopted when preparing to deduce the value 

 of the meridional degree from a combination of his proximate results, 

 was not strictly accurate. But as the effect of the resulting error 

 would scarcely have been appreciable, he did not deem it necessary 

 to recalculate the work. 



With the data already mentioned, Mr. Borden proceeded to deter- 

 mine the latitude of a Cardinal point, viz: the State House, Boston, 

 by comparison with several of the principal stations, as follows : — 



Resulting latitude 

 No. Place compared with Boston State House. of Boston State House. 



1) New Bedford Mariners' Church, 42° 21' 29" .81 



2) Harris Street Church in Newburyport, 29.70 



3) Salem East India Marine Hall, 30.37 



4) Saint Ann's Church in Lowell, 30.78 



5) Barnstable Court House, 31.04 



6) Sandwich Church in Sandwich, 29.94 



7) Highland Light House, Cape Cod, 28.78 



8) Nantucket South Tower, 28.95 



9) Holmes' Hole Windmill, 30.30 



9) 269.67 



Mean latitude of the State House 42° 21' 30". 00 



Mr. Paine's Astronomical Result 42° 21' 23".03 



Discrepancy 6".97 



The results arrived at from these data by Mr. Borden, on the final 

 reduction of the triangles of his survey, using for the latitude of the 

 State House 42° 21' 30", and for its longitude, that which is given 

 by Mr. Paine, Ah 44m 16s.6 west of Greenwich, are compared 

 with the results of the chronometrical survey of Mr. Paine, in the 

 following tables ; which exhibit also the number of altitudes of the 

 sun and north and south stars taken by Mr. Paine in determining 

 the latitude of each station, and the number of journeys made by him 

 with chronometers, and of the chronometers used by him on such 

 journeys, in ascertaining its longitude. 



