OF ARTS AND SCIENCES. 



TABLE IV. 



Light reflected when n = 1.55, and i is near angle of total polarization. 



TABLE V. 

 Light reflected when n = 1.55, and i is near 90°. 



for w= 1.55, the letters having the same meaning as in Table II. 

 Columns 5 and 6 furnish a means of determining A and B for any- 

 other value of n. They represent the change in these quantities, for a 



