CONTENTS. V 



Page 

 Lieut. Morrison's Observations and Experiments made upon an Instru- 

 ment termed a Magnet-Electrometer 74 



Mr. Thos. E. Blackwall on the Production of Crystals of Silver 74 



GEOLOGY. 



Mr. John Buddle's Observations on the Newcastle Coal-field 74 



Mr. D. Milne on the Berwick and North Durham Coal Fields 76 



Mr. Nicholas Wood on the Red Sandstone of the Tweed and Carlisle 78 



Mr. H. T. M. Witham's Account of Rolled Stones found in the main Coal 



Seam of Cockfield Fell Colliery 79 



Mr. T. SopwiTH on Sections of the Mountain Limestone Formation in 



Alston Moor, exhibiting the general uniformity of the several beds 79 



Mr. J. B. Jukes on the Position of the Rocks along the South Boundary of 



the Penine Chain ;... 79 



Mr. R.I. MuRCHisoN on the Silurian System of Strata 80 



Mr. R. Griffith on the Geological Structure of the South of Ireland . ... 81 

 Capt. PoRTLOCK on a small Tract of Silurian Rocks in the County of Tyrone 84 

 Account of the Footsteps of the Cheirotherium and five or six smaller Ani- 

 mals in the Stone Quarries of Storeton Hill, near Liverpool, communi- 

 cated by the Natural History of Liverpool 85 



Mr. Oram on a Plan of cementing together Small Coal and Coal Dust for 



Fuel 85 



Mr. Long's Description of a Cave at Cheddar, Somersetshire, in which Hu- 

 man as well as Animal Bones have been lately found 85 



Mr. Joshua Trimmer on the Discovery of the Northern or Diluvial Drift 

 containing Fragments of Marine Shells covering the remains of Terres- 

 trial Mammalia in Cefn Cave 86 



Mr. James Smith on the Shells of the Newer Pleiocene Deposits 87 



Mr. C. Lyell on Vertical Lines of Flint, traversing Horizontal Strata of 



Chalk, near Norwich 87 



Mr. John Leithart on the Stratification of Rocks 88 



Mr. John Leithart on Faults, and Anticlinal and Synclinal Axes 89 



Mr. Robert Were Fox on the Production of a Horizontal Vein of Carbo- 

 nate of Zinc by means of Voltaic Agency 90 



Sir D. Brewster on the Structure of the Fossil Teeth of the Sauroid Fishes 90 



Dr. Daubeny on the Geology and Thermal Springs of North America ... 91 



Mr. Austen's Considerations on Geological Evidence and Inferences 93 



Mr. T. W. Webb on Lunar Volcanos 93 



Mr. Thomas Sopwith on the Construction of Geological Models 94 



Rev. G. Young on the Antiquity of Organic Remains 9.5 



Dr. G. H. Adams on Peat Bogs 95 



GEOGRAPHY. 



Professor Von Baer's Recent Intelligence on the Frozen Soil of Siberia... £6 



Prof. Baer's Sketch of the recent Russian I'^xpeditions to Novaia Zemlia.. 96 

 Captain Washington's brief Account of a Mandingo, native of Nyani- 



Marii, on the River Gambia, in Western Africa 97 



Captain Washington on the recent Expeditions to the Antarctic Seas ... 97 

 Captain Washington's Summary Account of the various Government 

 Surveys in Europe, illustrated by specimens of the Maps of England, 



France, Austria, Saxony, Tuscany, &c. &c 98 



Lieut.-Col. Velasquez de Leon on the recent Government Map of Mexico 98 

 Major Jervis's Sketch of the Progress and Present State of the Trigono- 

 metrical Survey in India 98 



