532 



APPENDIX. 



la ; and M 

 Stevenson on 

 the Forma- 

 tion of Hol- 

 Jand. 



his having found and examined many specimens of 

 the rare moss Buxbaumia aphylla, and giving rea- 

 sons for believing it to be a plant of longer duration 

 than botanists have hitherto thought. Likewise a 

 paper by Mr Stevenson, on the Original Formation 

 of the Land now constituting the territory of the 

 United Dutch Provinces. 



Dec. 29. 

 Professor 

 Jameson on 

 the Rocks of 

 Sandside ; 

 and Mr J. 

 Murray on 

 the Lumino- 

 sity of the 

 Sea. 

 1820. 



Jan. 15, 

 Mr Trevel- 

 yan on the 

 Rocks of 

 Bamborough* 

 Mr Butter 

 on the 

 Change of 

 Plumage of 

 Female 

 Birds. Prof. 

 Jameson on 

 Change of 

 Plumage on 

 the approach 

 of Winter. 



Professor Jameson read an account of the Rocks 

 of Sandside in Sutherland, and illustrated the de- 

 scription by sections and specimens : and a paper 

 on the Luminosity of the Sea, by Mr John Murray, 

 Lecturer on Chemistry, was read. 



Professor Jameson laid before the Society, a no- 

 tice of some of the Mineralogical appearances at 

 Bamborough Castle, communicated by Mr Trevelyan 

 of Wallington. Mr Butter read a communication 

 on the Change of Plumage which is sometimes ob- 

 served in aged Female Birds, to that of the Male;, 

 being a supplement to the paper formerly read by 

 him on the same subject. Professor Jameson read 

 a short paper on the Mode in which the Change of 

 Colour in some Birds is accomplished on the ap- 

 proach of winter. 



Professor Jameson communicated to the Society, 

 his observations on the Similarity frequently exist- 



Jan, 29. 

 Professor 

 Jameson on 



and on the ' ing between what are called Whin-dikes, and Veins 

 the Wings and Beds of Quartz and Sandstone, illustrating them 



of Birds. 



