[neelin] the sensitiveness OF THE EYE TO LIGHT 



229 



,;4.§(ZM ^:5Q0 



in another the reciprocal of a small quantity at high intensity. And 

 while the reciprocals differ vastly in value the actual illuminating- 

 power of the two quantities may be indentical. In the one the incre- 

 ment of light was added at low intensity and therefore more of it was 

 required; in the other it was added at high intensity and less of it was 



