[deluryJ 



CONVECTION AND STELLAR VARIATION 



231 



Fig. 1, the dotted line supposedly representing the convection effect and 

 the other curve the tidal eflPect due to the satellite revolving in an orbit 

 of eccentricity 0.5. If the orbit is circular, changes in the light of the 

 star may be observed since the line of sight is fixed. When the satellite 





is acting most nearly in the line of sight the star will appear brightest 

 and this condition being slow to die out the star-light may appear to 

 fall away slowly from maximum in this case also. When the distance 



