LONCaTUDE OF McGlLL OBSEKVATORV. 



169 



With tlie.se value.s the residuals become 



For L.imp East. For L.inii) AVost. 



Tit Lamp J.a.-^t. Fur Lamp AVest. 



-0/23 +0.25 



-0.08 



+0.15 



+0.50 

 +0.6;î 

 +0.20 

 +0.50 



It is obvious that ou this date, as ou several other dates, the solution by least 

 squares fails to give the real values of the ooustauts (( aud c when the equations are 

 formed from the observations in one position of the instrument only, while the result- 

 ing residuals for à.T remain to a great extent unchanged. This will be seen by an 

 examination of the values of AT in the horizontal columns. Neither is there any gain 

 in the form of solution by equations of the form (G). 



CoLI.Et.'TIOX OF KesULTS FOR «. C, AXD A 7\ CAMBRIDGE OBSERVATIONS. 



Sec. in., 1885. 22. 



