Greenough's First Principles of Geologij. 63 



J. Critical Examination of the first Principles of Geology, in 



a Series of Essays. By G. B. Greenottgh, President of the 



Geological Society, F.R.S. F.L.S. 8vo. pp. 336. 



The essays in this volume, which are eight in number, treat 



of Stratification— of the Figure of the Earth— of the Inequalities 



which existed on the Surface of the Earth previously to theDiluyian 



Action, and on the Causes of these Inequalities — of Formations 



—of the Order of Succession in Rocks — of the Properties of Rocks 



as connected with their respective Ages— of the History of Strata 



as deduced from their Fossil Contents— and, of Mineral Veins. 



Transactions of the Royal Geological Society of Cornwall. 



Illustrated by Plates. Vol. I. 

 The Royal Geological Society of Cornwall was instituted on the 

 1 1th of February, 1814. The present, which is the first volume 

 of its Transactions, cor:tains the following articles: 



I. On a recent Formation of Sandstone occurring in various 

 Parts of the Northern Coast of Cornwall. By John Ayrton Paris, 

 M.D.— II. An Account of some Granite Veins atPorth Just, near 

 Cape Cornwall. By John Davy, M.D.— III. Notes on the Coast 

 West of Penzance,'and on the'Structure of the Scilly Islands. By 

 Ashhurst Majendie, Esq.— IV. A Sketch of the Geology of the 

 Lizard District. Bv Ashhurst Majendie, Esq.— V. Hints on the 

 Geology of Cornwal'l. By Sir Humphry Davy, LL.D.— VI. Ob- 

 servatior)s on a remarkable Change which Metallic Tin undergoes 

 under peculiar Circumstances, and on its partial Conversion into 

 a Muriate of Tin. Bv the Rev. William Gregor.— VII. Obser- 

 vations on the Process for making the different Preparations of 

 Arsenic, which are practised in Saxony, and on those for prepar- 

 ing Smalts or Cobalt, as pursued in Bohemia. By John Henry 

 Vivian, Esq.— VIII. A Sketch of the Plan of the Mining Aca- 

 demics of Freybcrg and Schemnitz. By John Henry Vivian, Esq. 



IX. On the Accidents which occur in the Mines of Cornwall, in 



consequence of the premature Explosion of Gunpowder in blast- 

 ing Rocks, and on the Methods to be adopted for preventing it, 

 by the Introduction of a Safety Bar, and an Instrument termed 

 the Shifting Cartridge. Bv John Ayrton Paris, M.D.— X. On 

 Elvan Courses. Bv Joseph Came, Esq.— XI. Notes on the 

 Limestone Rocks in' the Parish of Veryan. By S. J, Trist, Esci. 

 With an Appendix bv the Rev. John Rogers.— XII. On the Dis- 

 coverv of Silver in the Mines of Cornwall. By Joseph Came, Es(|. 



Xl'll. On Sul)marine Mines. By John Hawkins, Esq. —XIV. 



On some remarkablePhaenomena attending the Lodes of Polgooth 

 Tin Mine. Bv John Hawkins, Esq.— XV. Remarks on the Salt 

 Mines of VVielitska in Poland, and of Sal/burg in Germany. By 

 John Henry Vivian, Es(i.— XVI. Observations on the Geological 

 ■' Structure 



