64 Notices respecl'mg New Books. 



. Structure of Cornwall, with a View to trace its Connexion \vith, 

 and Influence upon, its Agricultural (Economy, and to establish a 

 rational System of Improvement by the scientific Application of 

 Mineral Manure. By John Ayrton Paris, M.D. — XVII. On a 

 Process of Refining Tin. By John Hawkins, Estj. — XVIII. On 

 the Introduction of the Steam-Engine to the Peruvian Mines. 

 By Henry Boase, Es(|. — XIX. Miscellaneous Notices of Facts 

 connected with the Mincralogical, Geological, and (Economical 

 History of the County of Cornwall. Extracted from the Minute 

 Book of the Society, viz. 1. On Kupfer-Nickel. By the Rev. 

 William Gregor. — 2. On a Cavern in Dolcoath Mine. By John 

 Rule, Esq. — 3. On Stalactites. By A. Majendie, Esq. — 4. Gre- 

 gorite (Menacchanite) discovered at Lanarth. By John Ayrton 

 Paris, M.D. — 5. On the Formation of a Substance resembling 

 Gneiss, taken from a Steam Boiler at Huel Alfred. Bv J. A. 

 Paris, M.D. — 6. A new Substance accompanying "Welsh Culm." 

 By J. A. Paris. — 7- On Stones and Clays annually exported from 

 Cornwall, for the Purposes of Architecture, Manufactures, and 

 the Arts. By J. A. Paris — S. Observations on Gold found in 

 the Tin Stream Works of Cornwall. By Sir Christopher Haw- 

 kins, Bart. — 9. Vegetable Remains in the Basin at Portleven. 

 By the Rev. John Rogers. — 10. Contributions towards a Know- 

 ledge of the Geological History of Wood Tin. By Ashhurst 

 Majendie, Esq. — 1 1. Notice relative to the Formation of Swim- 

 ming Stone. By Joseph Carne, Esq. — 12. Notice on Elvan 

 Courses. By Joseph Carne, Esq. — Queries proposed to Cap- 

 tains of Mines, and other Persons connected with the practical 

 Part of Mining. By John Hawkins, Esq. — Queries respecting 

 Lodes. By John Hawkins, Esq. — Account of Tin raised in 

 Cornwall in the Years ending with Michaelmas Coinage 181.5, 

 1816, and 1817. — Account of the Produce of all the Copper 

 Mines in Cornwall, in Ore, Copper, and Monev, for the Years 

 ending yOth June 1815, 1816, and ISI7. — Quantity of Copper 

 produced in Great Britain and Ireland in the Years ending iiOth 

 June 1815, 1816, and 1817. 



Conversations on Natural Philosophy, in which the Elements of 

 that Science are explained and adapted to the Comprehension 

 of young Pupil-,. Illustrated with Plates. By the Author of 

 " Conversations on Chemistry, and Conversations on Political 

 OEconomy." I8i9. 12mo. pp. 434. 



The title of this little volume explains its object so fully as to 

 render it unnecessary for us to say any thing on this point. We 

 will only add, that the work is well adapted to the comprehension 

 of those for whose benefit it is intended. The plate.s, which are 

 twenty-three in number, are by Lowry — a sufficient passport for 

 their accuracy. ' General 



