WORKS ON MINERALOGY AND GEOLOGY. 



Travels in Brazil through the Gold and Diamond Districts, brought 

 down to the present time, describing the methods of working the 

 Mines, extracting the Gold with Mercury, also the Natural Products, 

 Agriculture, Commerce, Population, Manners and Customs, with a 

 Map of the Author's journey from Rio de Janiero to Tejuco, the Capi- 

 tal of the Diamond territories. A new edition, price 18s., with nume- 

 rous colored plates — " I cannot close the account of Brazil, without 

 a strong recommendation of the Travels in the interior of that Coun- 

 try, with a particular account of the Gold and Diamond District, by 

 Mr. J. Mawe, Mineralogist, illustrated with colored plates." Dibdin. 



Amateur Lapidary's Guide, containing Instructions for Cutting, 

 Polishing and Slitting Hard Stones of every description. Price Is. (W. 



Lapidaries' Apparatus complete, with Jim-Peg or gauge (ox facet 

 work. This apparatus will perform every variety of work, and is ap- 

 plicable to polish Shells and soft Substances. Price, including Dia- 

 mond and Materials, £U). This apparatus may be worked on a par- 

 lour table. 



Mawe's Linn.ean System ok Conckology, in Hvo, describing the 

 Orders, Genera, and Species of Shells, arranged into Divisions and 

 Families, with a plate to each Genus (^(i). Price 1/. Is. plain, or 

 21. 12s. (id. most beautifully coloured after Nature. 



Mawe's Wodarch's Introduction to the Study of Conchology, 

 8vo., describing the characters of the Orders, Genera, and Species of 

 Shells; with an extensive Catalogue of names under each Genus, to 

 which is added the best mode of Collecting, Cleaning, and Preserving 

 Shells. 7 plates, l)s. plain; or 14s. colored. 



Shell Collector's Pilot, or Voyager's Companion, with a colored 

 Frontispiece, and plate of Insects. This Work is particularly adapted 

 for Voyagers in general, pointing out the places where the best Shells 

 were obtained during a Voyage of Discovery round the World; also 

 the best methods of preserving Insects, Birds, &c. 4th edit. Price 4s. 



An Illustrated Introduction to Lamarck's Conchology, being 

 a literal Translation of the Descriptions of the recent and Fossil gene- 

 ra, accompanied by Twenty -two highly finished Lithographic plates. 

 By E. A. Crouch, F. L. S. Price 1/. lis. 6d. plain ; or 3^ 3s. beautifully 

 colored. 



An Epitome of Lamarck's Arrangement of Testace.i;, with Il- 

 lustrative Observations, by C. Du Bois, F. L. S. Price 14.v. This is a 

 most excellent work, and comprises the essential parts of Lamarck's 

 Seven Volumes, 



