475 



2. On the Knowledge of Distance given by BiuocularVisions. 



By Sir David Brewster, K.H. 

 The following Gentleman was duly elected an Ordinary Fellow 



of the Society : — 

 Dr Thomas R. Colledge, Fel. Roy. Coll. Phys. Edin. 

 The following Donations of Books to the Society's Library 

 were announced, 

 The Electrical Magazine. Conducted by Mr Charles V. Walker. 



Vol I., No. 2. — By the Editor. 

 Literarische Sympathien oder industrielle Buchmacherei : Ein Beit- 

 rag zur Geschichte der neueren Englischon Lexicographie, von 

 Dr J. G. Flugel.— % the Author. 

 Fifty-Fifth Annual Report of the Regents of the University of the 



State of New York.— % Dr Christison. 

 Journal of the Asiatic Society of Bengal. Nos. 136, 137. 138. 



andlSQ.— By the Society. 

 Travels through the Alps of Savoy, and the other parts of the Pa- 

 risime Chain, with observations on the phenomena of Glaciers. 

 By James D. Forbes, F.R.S.S.L. and E., &c. kc-^By the 

 Author. 



Monday 6th May 1844. 

 Dr ABERCROMBY, V.P., in the Chair. 

 The following communications were read : — 

 1. On the Conversion of Relief by Inverted Vision. By Sir 



David Brewster, K.H. 

 2 On the Geology of Cockburn-Law and its Neighbourhood. 

 By William Stevenson, Dunse. Communicated by David 

 Milne, Esq. 



The author, in the first part of his paper, described the nature of 

 the formations, and in the last part offered his views in explanation 



of the appearances. 



In describing the formations, he enumerated.'first, those of aqueous. 



and last those of ligneous origin. 



I. The former consist of the greywacke, the old red sandstone, 

 and the coal-measure formations. 



