CONTENTS. 



Page 



the Absorption of the Prismatic Rays by co- 

 loured Media. By David Brewster, LL. D. 

 F. R. S. Lond. & Sec. R. S. Edin. - 433 



XXXI. On the Absorption of Light by Coloured Me- 



dia, and on the Colours of the Prismatic Spec- 

 trum exhibited by certain Flames; with an 

 Account of a ready Mode of determining the 

 absolute dispersive Power of any Medium, by 

 direct experiment. By J. F. W. Herschel, 

 Esq. F. R. S. Lond. & Edin. In a Letter to 

 Dr Brewster, - - 445 



XXXII. On the Mineralogy of the Faroe Islands. By 



W. C. Trevelyan, Esq. F. B. S. Edin., 461 



XXXIII. Electro-Magnetic Experiments and Obser- 

 vations. By Thomas Stewart Traill, M. D. 

 F. R. S. Edin. & William Scoresby,Esq.>n., 



F. R. S. Lond. & Edin., - .465 



XXXIV. Conjectures on the Analogy observed in the 

 Formation of some of the Tenses of the Greek 

 Verb. By John Hunter, LL. D. Professor 

 of Humanity in the University of St An- 

 drew's, - - 481 



History of the Society, - 493 



Laws of the Society, enacted 23d May 1811, 26th Fe- 

 bruary 1820, and %Uh January 1823, - 495 



List of the Office-Bearers and Members elected between 



January^. 1818, and March 3. 1823, - r 503 



List of the present Ordinary Members of the Society, in 



the order of their election, - - - 517 



List 



