DETERMINATION OF DEFLECTION OF LIGHT BY THE SUN'S GRAVITATIONAL FIELD. 325 

 Normal equations 



whence 



5S/+ 3-428* = -1 

 3-42S/ + 5-2lS/c = -62 



2-878* = 61 

 8/c = 21. 



Hence deflection at the limb is 



l"-75 0"-20== l"-55. 



(2) Comparison with Oxford Plate I 2 . 

 Theoretical plate constants 



a = +4-0, 6, d = +9-l.. e=+38-8. 



Normal equations 



whence 



5S/ + 3-428* = +2 

 3-42S/ + 5-21 8/c = -24 



2-87S/c= -25, 

 Sic = -9. 



Hence deflection at the limb is 



l"-75 0"-08 = 

 2 Y 2 



