( lu 



m. Corresponding Deg^rees in the 

 Fahrenheit and Centigrade 

 Scales. 



) 



rv. 



Befractive Indices, Dispersive 

 Powers, and Polarizing | 

 Angles. 



(1.) BKFBAcmTz Indicbb. 



Diamond 



Phosphorus 



Bisulphide of carbon 



Flint glass 



Crown glass 



Bock salt 



Canada balsam 



Linseed oil (sp. gr. • 932) 



Oil of turpentine (sp. gr. • 885) 



Alcohol 



Sea water 



Pure water 



Air (at 0° C. 760 mm.) 



(2.) Dispersive Powebs. 



Diamond 



Phosphorus 



Bisulphide of carbon 



Flint glass 



Crown glass 



Eock salt 



Canada bakam 



Linseed oil (sp. gr. '932) 



Oil of turpentine (sp. gr. -885) 



Alcohol 



Sea water 



Pure water 



Air 



(3.) PoLAsizntNG Angles 



Diamond 



Phosphorus 



Bisulphide cf carbon 



Flint glass 



Crown glass 



Bock salt 



Canada balsam 



Linseed oil (sp .gr. ■ 932) 



Oil of turpentine (sp. gr. ■ 886) 



Alcohol 



Sea water 



Pure water 



Air 



(A 



eS 



'a 





