4M 



Leigh Page, 



Fig. I. 



If n be measured normal to the ray, the deflection dD taking. 

 place in a distance ds is given by 



/ 9C ^ 



I 9C dr 



dD 



C dr dn 



ds 



Therefore the total deflection is 



cos 



Odd. 



+ 



n 



m n 



COS Odd 



A'' 



(72) 



As m^ 1.47 kilometers for the sun, a star seen close to the 

 limb of the sun (R = 697,000 km) should suffer an apparent 

 displacement 



D = i".74. 



Observations made at the eclipse of May 29th, 1919, confirm 

 this prediction of the theory, and even show that the deflection 

 decreases with the inverse first power of the distance from the 



