A 



JOURNAL . 



OF 



NATURAL PHILOSOPHY, CHEMISTRY, 



AND 



THE ARTS. 



NOVEMBER, 1811. 



ARTICLE I. 



On a Property of the repulsive Forces, that act on Light: 

 6yMr. Malus*. 



I 



N my last paperf I announced, that light reflected from Ne\*r properties 

 the surface of transparent bodies acquires new properties, j?^?"^^^^^®^ 

 which distinguish it essentially from that which emanate* 

 directly from luminous bodies. 



I have since continued my researches on the same sub- Invesiigatiou 

 ject ; and, subjecting the results of my experiments to cal- ^^^^^i'^'^^*'' 

 culation, I have arrived at some remarkable consequences, 

 which tend to elucidate the mode of action of substances oii 

 light. 



I had observed, that> when the light is reflected under a Reflected light 

 certain angle bv the surface of a diaphanous body, it ac- *'^'l""'sf t^he 



f^ •' "^ •" properties of 



quires the properties of the rays, that have been subjected to light doubly 

 double refraction : and, setting out with this remark, I con- '^^f'^cted, 

 trived to modify the rays of light by simple transparent sub- The partial re- 

 stances, so that they entirely escaped the partial reflection, transparent 

 which is commonly observed at the surface of these sub- substances! 

 stances. I cause any number of these substances to be *^ 



* Mfim. de laSoc. d'Arcueil, vol, II, p. 254, •}■ Journal, p. 95. 

 Vol. XXX. No. 138.— Nov. 1311. M traversed 



