Miscellanies. 413 



countries. Mr. Catherwood himself, every way a highly qualified 

 judge, pronounces Mr. Jones' work to be exceedingly correct. As 

 Mr. Jones possesses much and various knowledge of other countries 

 in which he has travelled, we cannot prove, in any way, more deci- 

 sively, our confidence and satisfaction in his work, than to say, that 

 in our judgment he cannot do better than to go on and tell the world, 

 if not like Johnson, all that he knows, certainly some share of that 

 part which remains untold. 



11. Gold Mines of Virginia. — For want of room, we are com- 

 pelled to postpone an article on the gold pines of Virginia, which we 

 intended to insert, (the facts being drawn chiefly from our own per- 

 sonal observation, made among the mines during the late autumn.) 

 We are satisfied of the great value of some of the mines, and that 

 many are worthy of a sober and rational exploration. 



There is, without any doubt, much gold in Virginia, diffused 

 through an extensive tract ; and there is great reason to believe that 

 there are still many places in the same geological and geographical 

 region, in which it lies undiscovered, and is still to be brought to 

 light; we hope to add more in our next number. 



12. Exchanges in Conchology. — Dr. J. C. Jay, 22 Bond street, 

 New York, has recently published a second and improved edition of 

 his Catalogue of Recent Shells, with descriptions of new or rare 

 species, illustrated by four colored plates. 



Dr. Jay's collection is well known for its extent and beauty, and 

 for the excellence of its arrangement. We are given to understand 

 that it will " give him pleasure to exchange duplicate specimens, and 

 that he will receive live and perfect shells, whether they are enu- 

 merated in his catalogue or not ; and as far as he is able, he will 

 supply whatever may be desired in return." 



13. JYew Work on Mineralogy. — A Treatise on Mineralogy, by 

 James D. Dana, A. M., assistant in the department of Chemistry, 

 Mineralogy and Geology in Yale College, is in press in this city, and 

 will be published in about three months. It will comprise an ex- 

 tended introduction, together with full descriptions of species, and 

 an appendix upon the application of analytical geometry to the sci- 

 ence of Crystallography. The work will constitute an octavo vol- 

 ume of about 450 pages, and will be illustrated by 200 wood cuts, 

 and four copperplates containing 150 additional figures. It will be 

 published by Durrie U Peck, and Herrick U Noyes. 



