CONTEXTS. 



IV. On the Electricity and Explosive Force of Steam, 

 and on the Economy of the Hot-Blast Furnace. 

 By Henry Meikle, Esq. Communicated by 

 the Author, .... 55 



V. Address to the Geological Society, delivered at 

 the Anniversary, on the 21st of February 1S40. 

 By the Rev. Professor Buckland, . 57 



Devonian System. — Coal-Formation. — Wealden and 

 Portland Formations. — Chalk-Formation. — Super-cre- 

 taceous Formations. — Igneous Rocks. — Palaeontolo- 

 gy. — Crustaceans. — Worms. — Icknology. 



VI. Geological Notes made during a Journey from the 

 Coast into the Interior of the Province of Cear.i, 

 in the North of Brazil, embracing an Account 

 of a Deposit of Fossil Fishes. By George 

 Gardner, Esq., of Glasgow. Communicated 

 by J. E. Bowman, Esq., of Manchester, . 75 



VII. On the Fossil Fishes found by Mr Gardner, in 

 the Province of Ceara, in the North of Brazil. 

 By Professor Agassiz. Communicated by the 

 Author, ..... 82 



VIII. On Hydrostatical Pressure as a cause of Earth- 

 quakes. By the Rev. John Toplis, B. D. 

 Communicated by the Author, . . 84 



IX. Brief Observations on the State of the Arts in 



Italy, with a short account of Cameo-Cutting, 

 Mosaic Work, Pietra Dura, and also some of 

 the Domestic Arts and Mechanical Contri- 

 vances of the Italians. By C. H. Wilson, Esq., 

 A.R.S.A., &c. Communicated by the Society 

 of Arts for Scotland, ... 90 



X. On the Frozen Soil of North America. By John 



Richardson, M. D., F. R. S., &c. Inspector of 

 Naval Hospitals. Communicated by the Au- 

 thor, . . . . .110 



XI. On the Cultivation of the Cerealea in the High 

 Latitudes of North America. Comprised in 

 the Extract of a Letter from Peter Warren 

 Dease, Esq., Chief Factor of the Hudson's Bay 



