CONTENTS. m 



Page 

 XII. On the Temperature limiting the Distribution 

 of Corals. By James D. Dana, Geologist 

 of the United States Exploring Expedition, 340 



XIII. On the Areas Of Subsidence in the Pacific, as 



indicated by the Distribution of Coral 

 Islands. By James D. Dana, Geologist of 

 the United States Exploring Expedition, .^41 



XIV. An Account of Experiments with Thermo- and 



Hydro-Electrical Currents, with an exami- 

 nation of the Metals exposed to Thermo- 

 Electric action. By Mr R. Adie of Liver- 

 pool. Communicated by the Author, . 346 

 XV. Zoological Summary of the Extinct and Living 

 Animals of the Order Edentata. By Pro- 

 fessor Owen, .... 353 

 Conspectus Familiarum, Generum, et Specierum, 



Brutorum frondes carpentium, . . . 359 



XVI. Description of an Improved Long Slide- Valve 

 for Condensing Engines. By Mr John 

 Maxton, F. R. S. S.A., Engineer, Leith. 

 Communicated by the Royal Scottish So- 

 ciety of Arts. With a Plate, . . 361 



XVII. General Considerations regarding the Palseon- 

 tOlogy of South America compared with that 

 of Europe. By M. Alcide D'Orbigny, 362 



XVIII. On Sigillaria, Stigmaria, and Neuropteris, 372 



XIX. On the Chemical Constitution of Philipsite or 



Lime Harmotome. By Arthur Connell, 

 Esq., F.R.S.E., Professor of Chemistry in 

 the United College and University of St 

 Andrews. Communicated by the Author, 375 



XX. Proceedings of the Royal Scottish Society of 



Arts, ..... 377 



List of Prizes of the Royal Scottish Society of 

 Arts, for Session 1843-44, . . 382 



XXI. Scientific Intelligence— 



^ • 



METEOROLOGY. 



1. Observations on the Aurora Borealis, made at 

 Kaafjord in Norway. 2. Mr Hopkins on the 



