Second Series .-^-Circular Polarization. 471 



place at metallic surfaces, renders it easier to obtain distinct re- 

 sults than in some other cases, the intricacy of the subject, and 

 some deviations from the laws of light, as established in Sir 

 David Brewster's remarkable paper on this subject,* demand a 

 more prolonged investigation than I have yet been able to give 

 to it. In the hope of being able to resume it in another paper, 

 I content myself at present with a reference to the facts respect- 

 ing Metallic Reflection, communicated to the Society on the 

 21st of March last, a memorandum of which will appear in their 

 printed Proceedings. 



Edinbukgh, 2d May 1836. 



* Philosophical Transactions, 1830. 



