1^8 A general VieiL> of the 



in its favour. The advertlfenient, however, continues to be 

 regularly inferted ; and I therefore deem it expedient to ap- 

 peal thus publicly againft fiich a proceeding; efpecially in 

 behalf of a man who has imitated the original only in copy- 

 ing, with imblufhing eftVontery, an advertifement drawn up 

 by mvfelf. 



I believe there are few of your readers who will not agree 

 •with me, that the ordinary forms of civility required that 

 Dr. Trotter fliould have taken further notice of the letter 

 addrelfcd to him ; that fuch an attention ought to have been 

 paid to one of the oldeii. praditioners of medicine in this 

 country ; and that more refpeel was due to a man (whom I 

 truft it is not unbecoming in me to charaAerize, in terms al- 

 ready publicly applied to him virts laudatis *) " refpeC^able 

 infcicnce and in literature," and "diflinguifhed by ingenuity, 

 honour, and the ftri6leR integrity." 



I remain refpeftfuUy, Sir, your obedient fervant, 



William Henry. 



XXVIII. A general Vieiu of the Coal Mines worked in 

 France J of their different Prodiids, and the Means of cir- 

 culating them. By C. Lkfebvre, Member of the Cowictl 

 ^ Mines, ef the Philomatic Society, &c, ^c. 

 [Continued from p. 76.] 



Department of Ardennes. 



JL HERE are no coal mines known in this department. 



Refearches have been made at Etion, but without fuccefs. 

 They were begun in fchiftous ftrata, which exhibited no in- 

 dication fufficient to caufe the labour to be continued ; and 

 the manner in which they were conduced was calculated 

 only to produce lofs, fince thofe who directed it followed the 

 courfe of the fchillous ftrata, inftead of traverfing them to 

 difcover the changes, if there were any, in the order of the 

 ftrata. 



This department receive? coals from that of Ourthe, which 

 are conveyed to it up the Meufe. 



Department of Arriege. 



This country (7), abundant in metallic fubftances, and 

 particularly in iron mines of an excellent quality, poffelfes no 

 coal mines worked. 



C. Vergnicz-Bouifcher, proprietor of the forges of Vic- 



* Dr. Aikiu anc! Dr. Pcrcival. 



deflTos, 



