1G3 



In this list the following places occur more than once, viz. : 



Adopting these means as the nearest available results — and 

 giving to each locality its difference of latitude and longitude 

 (measured in geographical miles) from an assumed centre, we 

 have the following general Table of differences of dips referred 

 to two coordinates, x and y, whose origin is a point in the 

 centre of the area in lat. N. 54*6, longit. W. 1*30, at which 

 the dip is made Zero. The measures are given to the nearest 

 mile or minute only. 



Table A. 



PLACE OF OBSERVATION. 



Newcastle . 

 Carlisle .... 



Penrith 



High Force . 



Croft 



Lazenby .... 

 Whitby .... 

 N. Allerton . 

 Osmotherley 



N. or S. 



centre of 



area in 



geog. miles. 



h 



+ 52 

 + 48 

 + 34 

 + 34 

 + 22 

 + 27 

 + 23 

 + 14 

 + 16 



E. or W. 



centre of 



area in 



geog. miles. 



a 



+ 4 

 + 49 

 + 44 

 + 23 



+ 1 



— 17 



— 32 



— 2 



— 7 



Dip greater 



or less 

 than that 

 of mean. 



C 



+ 24-7 

 + 35-1 

 + 300 

 + 191 

 + 13-8 

 + 10-3 

 + 5-3 

 + 7-5 

 + 10-0 



