324 W. B. STOKES ON MULTIPLE IMAGES IN MIRRORS. 



rays pass respectively from O to 1 and 2 l will be reflected to 

 E as one image. 



I should imagine the 3rd image to arrive at E through 1, but 

 I have not yet worked this out. 



Of course, placing the eye at and the object at E would be 

 equivalent to revolving the mirror. 



The images vary slightly in size owing to their various 

 distances. 



No. 2 is the brightest except at great obliquity. 



