PAGE 



On an Inaccuracy (having its ^eatest value about 1") in the 

 usual method of computing the Moon's Parallax. By 

 Edward Sang, Esq., .... 292 



Monday, 5th March 1855. 



On Annelid Tracks in the Exploration of the Millstone Grits 

 in the South-west of the County of Clare. By Robert 

 Harkness, Esq., F.G.S., Professor of Geology, Queen's 

 College, Cork, ..... 294 



On Superposition. By Professor Kelland, 296 



On the Colonring Matter of the Rottlera tinctoria. By 

 Thomas Anderson, M.D., Regius Professor of Chemis- 

 try in the University of Glasgow, . . .296 



Donations to the Library, . . . .298 



Monday, I9th March 1855. 



Experiments on Colour as perceived by the Eye, with Re- 

 marks on Colour-Blindness. By James Clerk Max- 

 well, Esq., B.A., Trinity College, Cambridge. Com- 

 municated by Professor Gregory, . . 299 



Notice of the Occurrence of British newer Pliocene Shells 

 in the Arctic Seas, and of Tertiary Plants in Greenland. 

 In a letter from Dr Scoular of Dublin. Communicated 

 by .Tamks Smith, Esq., of Jordanhill, . 3o'l 



Monday, 2d April 1855. 



Account of Experiments to ascertain the amount of Prof. 

 Wm. Thomson's " Solar Refraction." By Prof. C. 

 PiAzzi Smyth, ■ . . . . 302 



On the Extent to which the Theory of Vision requires us to 

 regard the Eye as a Camera Obscura. By Dr George 

 Wilson, ... ;^q;;{ 



Researches on the Amides of the Fatty Acids. By Thoma.- 

 H. RowNEY, Ph.D., Assistant to Dr Andei-son. Com- 

 municated by Dr Anderson, 305 



