CH. xxi. POLARISATION OF LIGHT. 181 



lished in 1690, under the title 'Traite de la Lumiere.' He 

 remained in Paris for some years ; but left and returned to 

 Holland when the persecution of the Protestants began after 

 the revocation of the Edict of Nantes. He died in 1695. 



Chief Works consulted. HerschePs 'Familiar Lectures' art. 

 'Light;' Tylor, 'On Refraction' Nature,' vol. ix. ; 'Edin. Phil. 

 Journal,' vols. ii. and iii. 'On Double Refraction;' Ganot's 'Phy- 

 sics;' Encyclopaedias ' Britannica,' ' Metropolitana,' and Brewster's. 



