Vol.62. Philosophical Magazine. August 1823. 

 Contents of Number 304. 



XVI. Ueflections on Volcano?. By M. Gay-Lussac .... Page 81 



XVII. Analysis of a Woik, entitled •' Observations and Experi- 

 ments made at Vesuvius during Part of the Years 1821 and 1822: by 



T. MoNTicELLi and N. Covelli." By M. Mevard de la Groye 90 



XVill. Notice on the ♦' Essays of Jean Rey." By Mr. John 

 Murray, F.L.S. M W.S 93 



XIX. An Account of the Observations and Experiments on the 

 Tet iperature ot'lMines, which liave recently been made in Cornwall, 

 and the North of England ; comprising the Substance of various 

 Papers on the Subject iatel}' published in the Transactions of the 

 Royal Geological Society of Cornwall, and other Works 94< 



XX. On Electro-Magnetism. By Mr. J. Tatum 107 



XXI. True apparent Right Ascension of Dr. Maskelyne's 36 

 Stars for every Day in the Year 1823 110 



XXII; An Account of the remarkable Accumulation of the Ex- 

 uvias of Bears, in a Cave at Kiihloch in Franconia. By Professor 

 BUCKLAND 112 



XXIII. Observations upon the Cndmia found at the Ancram Iron- 

 Works in Columbia County, New York, erroneously supposed to be 



a new Mineral. By Wm. H. Keating 115 



XXIV. On a Planetary Analogy ; or a Law of Motion pervading 

 and connecting all the Planetary Orbits. By Mr. J. Utting .... 119 



XXV. State of the Thermometer at Smyrna for every Day in the 

 Year 1820, taken at 9 A.M., Noon, 6 P.M., and Midnight. Com. 

 municated from Smyrna by a Correspondent to Dr. T. Forster . . 121 



XXVI. Notice of the Fusion of Plumbago, or Graphite, (commonly 

 called Black Lead,) in a Letter from Professor Silliman to Prof. 

 RoBfERT Hare, M.D. 124- 



XXVII. Experiments upon Diamond, Anthracite, and Plumbago, 

 with the compound Blowpipe : in a Letter addressed to Professor 

 Robert Hare, M.D. by Professor Silliman 131 



XXVIII. Observations on Marquis Laplace's Communication to 

 the Royal Academy of Sciences " Sur l' Attraction des Spheres, et 



sur la Rdpulsion des Fluides elastiques." By John Hera path, Esq. 136 



XXIX. A New Plan of Tunnelling, calculated for opening a Road- 

 way under the Thames. By M. J. Brunel, Esq. C.E. F.R.S. .. 139 



XXX. Notices respecting New Books : Analysis of Periodical 

 Works on Natural History 14-2-14'4' 



XXXI. Proceedings of Learned Societies : Royal Academy of 

 Paris — Ceylon Literary and Agricultural Society 145-147 



XXXII. Intelligence and Miscellaneous Articles: Astronomical 

 Information — Statistics— On the Solar Eclipse of July 8 — Eruption 

 of Galoengoeng in Ja-a— Capt. Sabine's Expedition — Chesnut-tree 

 Bark— Production of Cyanogene by the Action of Carbon upon 

 Nitric Acid — On the Inflammability of Ammoniacal Gas, by Prof. 

 Silliman — New Species of Usnea, from New South Shetland — Re- 

 medy for the Bite of Serpents — Feeding of Engine Boilers — Ap- 

 paratus for describing Curves — Obituary — List of New Patents — 

 Meteorological Table 150-160 



%* Communications for this Work, received by the Editors, 

 38, Shoe-Lane) will meet with every attention. 



RICHARD TAYLOR, PRINTER, SHOE-LANE, LONDON. 



