CONTENTS. 



?* ' " - r 



PART SECOND. 



Page 



XVI. Inquiry into the Structure and probable Functions 

 of the Capsules forming the Canal of PETIT, and 

 of the Marsupium Nigrum, or the peculiar Vas- 

 cular Tissue traversing the Vitreous Humour in 

 the Eyes of Birds, Reptiles, and Fishes. By 

 ROBERT KNOX, M. D. F. R. S. ED., and Con- 

 servator of the Museum of the Royal College of 

 Surgeons, - - 231 



XVII. On an Anomalous Case of Vision with regard to 



Colours. By GEORGE HARVEY, Esq. F. R. S. E. 253 

 XVIII. Observations on the Germination of the Filices. 

 By the Reverend JOHN MACVICAR, Dundee. 

 Communicated by the Reverend JOHN FLEM- 

 ING, D. D. F. R. S. E. &c. - 263 

 XIX. Description of FERGUSONITE, a New Mineral 



Species. By W. HAIDINGER, Esq. F. R. S. E. 271 

 XX. Biographical Account of ALEXANDER WILSON, 

 M. D. late Professor of Practical Astronomy 

 in Glasgow. By the late PATRICK WILSON, 

 A. M. Professor of Practical Astronomy in the 

 University of Glasgow, - 279 



XXI. On the Determination of the Species, in Minera- 

 logy, according to the Principles of Professor 

 MOHS. By WILLIAM HAIDINGER, Esq.F.R.S.E. 298 

 XXII. On the Consolidation of the Strata of the Earth. 

 By SIR JAMES HALL, Bart. F. R. S. Lond. & 

 Edin. 



XXIII. Observations before and after the Superior Conjunc- 

 tion of Venus and the Sun, with the Mural 



