Transparent Bodies by the action of Magnetism. 499 



Experiment No. IV. 



Distance between the armatures, 80 millims. 10 Bunsen's 



elements. 



Magnetic action 87-5 



Azimuth of the tint of passage 190° 0' 



Azimuth after inverting the current . . . 184° 13' 15" 



Magnetic action 88-0 



Double rotation, 5° 46' 45"; mean magnetic action, 8775 ; 

 ratio, 3 - 95. 



Experiment No. V. 



Distance between the armatures, 90 millims. 10 Bunsen's 



elements. 



Magnetic action 64«0 



Azimuth of the tint of passage 189° 0' 



Azimuth after inverting the current . . . 185° 4' 15" 



Magnetic action 63-25 



Double rotation, 3° 55' 45"; mean magnetic action, 63-62; 

 ratio, 3*71. 



Experiment No. VI. 

 Bisulphide of carbon ; thickness, 44 millims. White light was 

 used. Distance between the armatures, 62 millims. 20 Bun- 

 sen's elements. 



Magnetic action , 151-0 



Azimuth of the tint of passage 183° 53' 45" 



Azimuth after inverting the current . . . 190° 10' 



Magnetic action 149-75 



Double rotation, 6° 16' 15"; mean magnetic action, 150-37; 

 ratio, 2-50. 



Experiment No. VII. 



Distance between the armatures, 90 millims. 20 Bunsen's 



elements. 



Magnetic action 113 



Azimuth of the tint of passage 184° 39' 15" 



Azimuth after inverting the current . . . 189° 16' 45" 



Magnetic action 112-75 



Double rotation, 4° 37' 30"; mean magnetic action, 112-87; 

 ratio, 2*46. 

 2K2 



