CONTENTS OF N 50. New Series. 



XIII. On the Construction of the Berlin Astronomical Ephemeris 



for 1832. By Professor ENCKE page 81 



XIV. Remarks on the Geology of the Banks of the Tweed, from 

 Carham, in Northumberland, to the Sea Coast at Berwick. By 

 N. J. WINCH, Esq. Secretary of the Natural History Society of 

 Xewcastle-upon-Tyne T 85 



XV t On the Limits upon the Earth's Surface within which an Oc- 

 cultation of a Star or Planet by the Moon is visible. By J.W. LUB- 

 BOCK, Esq. F.R.S 90 



XVI. Tables of the Decimal Parts of a Day and an Hour. By 



A CORRESPONDENT 92 



XVII. On the alleged Production of Heat in Mines by the Con- 

 densation of the Air which ventilates them ; and on the Fallacy of 

 other Objections to the Opinion that a high Temperature exists in 



the interior of the Globe. By ROBERT W. Fox, Esq 94 



XVIII. On the Stability of the Solar System. By J. W. LUBBOCK, 

 Esq. F.R.S 99 



XIX. Remarks on the Origin of Rock-basins; in reply to a Paper 



by Mr. E. W. BRAYLEY, Jun. By the Rev. THOMAS MOORE 101 



XX. An Examination of those Phaenomena of Geology which 

 seem to bear most directly on theoretical Speculations. By the Rev. 



W. D. CONYBEARE, M.A. F.R.S. F.G.S. &c. (To be continued) .... Ill 



XXI. On the tidelike Wave of Lake Ontario. By SAMUEL 

 SHARPE, Esq. F.G.S 117 



XXII. Observations relative to the Origin and History of the Bush- 

 men. By ANDREW SMITH, M.D. M.W.S. &c. (To be continued.) . . 119 



XXIII. An Account of an Aurora Borealis observed at Woolwich 



on the Night of January 7th, 1831. By Mr. WILLIAM STURGEON . 127 



XXIV. Notices respecting New Books: Mr. De la Beche's Sec- 

 tions and Views illustrative of Geological Phaenomena 131 



XXV. Proceedings of Learned Societies : Royal Society ; 

 Geological Society ; Linnaean Society; Astronomical Society; Zoo- 

 logical Society 133-147 



XXVI. Intelligence and Miscellaneous Articles ; On the spon- 

 taneous Inflammation of powdered Charcoal ; On pure lodic Acid, 

 and the Detection of the Vegetable Alkalies ;,Para-tartaric Acid; On 

 the Chlorides of Iodine and the Detection of the Vegetable Alkalies ; 

 Chloride of Gold and Potassium, &c. ; Vauquelin's Process for ob- 

 taining Chromium; Carburet of Sulphur not decomposed by Elec- 

 tricity; Influence of the Aurora Borealis on the Magnetic Needle j 

 Nitrous Atmosphere ofTirhoot; On the Occurrence of Chalk-flints 

 in Banffshirej NewScientfic Books ; The Comet ; Lunar Occultations 

 of Planets and fixed Stars by the Moon, in February 1831; List 

 of New Patents ; Meteorological Observations for December 1830, 

 Table, &c 14-8-160 



\* It is requested that all Communications for this Work may be addressed, 

 post paid, to the Care of Mr. R.Taylor, Printing Office, Red Lion Court, 

 Fleet Street, London; where complete Sets of the Old Series of the Phi- 

 losophical Magazine may be had at half of the original price. 



