of Reflexion of Polarized Light. 



Table VIII. 

 Azimuth of polarizer =86°. Red sunlight. 



17 



ii:t 



In this table the value of (/> diminishes from 83° to 48°, and rises 

 then to 60° ; as the incidence approaches the principal incidence 

 the motion becomes more rapid, and at that incidence the axis 

 major is perpendicular to the plane of incidence : having passed 

 this angle, it diminishes again to 58° negative, and then rises 

 again to 83° negative. This motion of the axis major verifies 

 Law VI., and explains the apparent anomaly in the value of <f> 



in Table VII. A comparison of the values of -r in Tables VII. 



and VIII. proves the truth of Law IV. 



The principal incidence is 55° 8', at which angle, since the 

 axis major is perpendicular to the plane of incidence, the quan- 

 tity of light reflected in the plane of incidence is to the light 

 reflected in the perpendicular plane as 1 r 1*12. 



Table IX. 

 Azimuth of polarizer =87°. Red sunlight. 



