164 Skclcb of the Generul liijlory of Mm'ing. 



now worked are Afgental, where it appears there arc abun- 

 dant collciftions of coal ; La Pleau, where feveral ilrata arc- 

 known, and worked with facihty, bccaiife thev form part of 

 a mountain in which galleries for extracting the coals, and 

 hifFering the water to run off, are conftrucled at a fmall ex- 

 penfe: in a word, the connnuncs of the Cublac, Venteirac, 

 and the entirons of Alailac. 



The annual product of thcfe different mines may be cfii- 

 niated at 50,000 myriagramines. That of La Ploau fupplies 

 the manufaAory of arms at Tulles, it aftords the principal 

 confumplion ; and that of Montignac fupplies the manufac- 

 tory of IBergerac. 



The Vezcre, which begins to be navigable at Uzcrche, 

 and La Corrcze at Tulles, furniih fome means of tranfporta- 

 tion for the other mines. The Dordoene, which is navi- 

 gable for boats onlv at Souillac, would furnifli more means 

 of ailivity to the mines of La Pleau, and thofe of ArgentaU 

 were it rendered navigable as far as the latter. 



The mean price ot the coals is 10 cents per myriagramme. 

 The mines in general are badly wuikedj as they want a fuf- 

 iicienl confumption. 



Corjica and the Ijland of Elba. 



The information hitherto obtained in regard to the mineral 

 prottutlions of thei'e two iflands does nut afturd realon to 

 think that they contain coals. 



[ To be cutitinueil.] 



XXIX. Sketch of the GdHtral H'ljhry of ISJinhig. 



SIR, To I\fr. Tdlnch. 



1 AM happy in having it in my power to add to the Sketch 

 of the Hillory of Mining in Devon and Cornwall, with which 

 I fome lime fince troubled von *, a more extended view of 

 the fubjecl; from the hands of an ingenious friend. If the 

 infertion of either the former or the prefent in your valuable 

 work dial! ever draw to the fubjed; the attention of thofc 

 who are able, in different dillrifts, to enlarge our knowledge 

 on this head, it may be a general benefit, and will gratify 



Your obedient fervant, 

 Taviftotk, John Taylor. 



March 1803. 



* See vol. V. p. 357 — 365. 



Sketch 



