DISTRIBUTION OF THE MAGNETIC DECLINATION. 



Distribution of the Magnetic Declination for the Epoch, 1842.0. 

 Prom ill" comparison of Observations for secular change, wc have : — 



Uarrisburg, annual increase . 1'.5 



Johnson's Tavern, " ..... 2.2 



Philadelphia, " ..... 3.2 



Williarasport, " . . . . .2.6 



Erie, " ..... 3.0 



Bath, " ..... 3.6 



Mean . . . .2.1 



Toronto, between 1 845 and 1 855 (see Vol. III. of the 01>s'ns) . 2.3 



General Table of results referred to the common epoch 1842 



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