336 C. A. Schott on Magnetic Declination. 
forming group j 
Burlington and Williamsburg. This smaller amplitude WS 2 
found nearly constant and equal to 0°4. ; the 
T'o make the present paper more complete it contains also th ’ 
record of all observations used in the discussion not heretolo® 
published in the Coast Survey reports. 
tables no value, deduced by the formula, has been inserted amie ; 
cedent to the first observation by more than. ten years. pee 
tabular values may therefore be regarded in the light of a sim a 
s 
exceeds half a dozen, properly distributed in relation to WN 
The probable error of is single representation will ine : 
in the second table. For all ordinary use by the waco 2 
navigator) the tabular values are sufficiently precise, ig 
ter racy is required the annual inequality of the ust De 
iurtfal variation for the time required @ 
