164 



PLACE OF OBSERVATION. 



Dip greater 



or less 

 than that 

 of mean. 



Hambleton .... 

 Scarborough.... 



Thirsk 



Helmsley 



Craike 



Malton 



York 



Flamborough . 

 Bridlington .... 



Doncaster 



Harrogate 



Sheffield 



Pocklington .... 



Arras 



Selby 



Burton 



Howden 



Hull 



Castleford 



Shipley ... , 



Skipton 



Settle 



Penyghent .... 



Lancaster , 



K. Lonsdale 



Horton 



Litton , 



Gearstones .... 

 Birkenhead .... 

 Calderstone .... 

 Lincoln 



c 

 + 11-0 



— 7-2 



+ 

 + 



+ 



60 

 5-5 

 2-8 



— 4-7 



— 5-0 

 -15-3 



— 11-4 

 -23-5 



— 1-7 

 -21-9 



— 8-9 



— 12-5 

 -11-4 



— 8-4 

 -15-4 

 -15-8 

 -13-5 



— 7-4 



— 4-2 

 4-5 

 7-4 

 8-1 

 8-9 

 4-5 



+ 



+ 



+ 



+ 



+ 



+ 10-9 



+ 10-9 



-14-0 



— 9-9 



— 33-0 



In this series of 40 stations, each weighed separately against 

 an assumed central station, every observation gives rise to an 

 equation of the form 



a X ^ h y = c, 



