X CONTENTS. 



On the Action of Disintegrated Surfaces of Crystals upon Light. 

 By Sir David Brewster, ..... 148 



Observations on the Pulsation of the Heart and Arteries. By Dr 

 Knox, 148 



On an Expression for the effort required to ascend Planes of differ- 

 ent Inclinations. By Professor Forbes, . . . 149 



Observations on some new Species of British Fishes. By Dr Par- 

 nell, 150 



On the Power of the Periosteum to form new Bone. By Professor 

 Syme, ........ 153 



On the Action of Voltaic Electricity or Pyroxylic Spirit, and on 

 Solutions in Water, Alcohol, and Ether. By Arthur Connell, 

 Esq., 156 



Geological Observations on Binuy-Crag in West Lothian. By 

 Charles Maclaren, Esq., ..... 159 



Notice of Experimental Researches into the Laws of certain Hydro- 

 dynamical Phenomena, that have not hitherto been reduced into 

 conformity with known laws. By John Scott Russell, Esq., 161 



List of a large Collection of preserved Fishes, presented to the 

 Royal Society by Dr Parnell, ..... 164 



On the Constitution of the Earth's Atmosphere in remote Geolo- 

 gical Epochs. By Professor Johnston, Durham, . . 165 



Account of a new Species of British Bream, and a Species of Skate 

 new to Science, with a List of, and Observations on, the Fishes 

 of the Firth of Forth and Neighbourhood. By Richard Parnell, 

 M.D., 166 



Notice on the Composition of the Right Prismatic Baryto-Calcite, 

 the Bicalcareo-Carbonate of Baryta of Dr Thomson. By Pro- 

 fessor Johnston, ...... 167 



An Explanation of the Aristotelian Expression metk Ta*u«-ma, with 

 some inferences from the Explanation. By the Venerable Arch- 

 deacon Williams, ...... 163 



On the Food of the Herring and Salmon. By Jolm Stark, Esq., 170 



Dr Barry made some verbal remarks on the Physiology of the Pro- 

 teus Anguinus, ....... 170 



Remarks on the Ossiferous Caves of Cefn, in Denbighshire. By Dr 

 Traill, 176 



Experiments on the Growth of the Fry of the Salmon, from the ex- 

 clusion of the Ova to the age of seven months. By Mr John 

 Shaw, ........ 178 



On the Terrestrial Mechanism of the Tides. By John Scott Rus- 

 sell, Esq., 179 



Notice regarding the Composition of Dr James's Fever Powder. 

 By Dr Douglas Maclagan, ..... 183 



Observations on the Cysticercus Cellulosse inhabiting the Human 

 Muscles. By Dr Knox, ..... 185 



Examination of certain Objections to the Theory of Isomorphism. 

 By Henry Madden, Esq., ..... 186 



Observations on the Parr and Young of the Salmon. By Dr Parnell, 187 



