23 



Liebig, Giessen, 



Melloni, Naples, 



Neander, Berlin, 



all of whom were declared to have been duly elected Foreign 

 Honorary Members of the Society. 



The following Donations were presented : — 



List of Specimens of Birds in the Collection of the British Museum. 



Parts 1. and 3. Accipitres, Gallinse, Grallse, and Anseres. 

 List of the Specimens of Lepidopterous Insects in the Collection of 



the British Museum. Part 1. 

 List of the Specimens of Myriapoda in the Collection of the British 



Museum. 

 •Catalogue of the Tortoises, Crocodiles, and Amphibsenians, in the 



Collection of the British Museum. — By the Trustees of the 



British Museum. 

 The Electrical Magazine, conducted by Mr Charles W. Walker. 



Vol. I. No. 7. —By the Editor. 

 Tijdschrift voor Naturlijke Geschiedenis en Physiologie — Uitgege- 



ven door I. van der Hoeven, M.D. en W. H, De Vriese, 



M.D. Deel XL Stuks 3, 4.— By the Editors. 

 Cast of the Bust of the late Professor Playfair, which was executed 



by the late Sir Francis Chantrey. — By Sir George Mackenzie^ 



Bart. 

 Fifteenth Report of the Scarborough Philosophical Society.— ^y 



the Society. 



Monday, 3d March 1845. 



Sir T. M. BRISBANE, Bart., President, in the Chair. 



The following Communications were read :— 



1. On the Existence of peculiar Crystals in the Cavities of 

 Topaz. Part II. By Sir D. Brewster, K.H. 



The author, after alluding to his former papers on the fluids in 

 topaz, described, in Section I., the form and position of the strata in 

 the minerals in which the cavities occur. They generally occur in 

 immense numbers, occupying extensive strata, and injuring the 

 transparency of the mineral. These strata occupy every possible* 



