iSn A general View cf the 



mated at about 320,000 myriagrammes annually. The mean 

 price is from 8 to 10 cents jx-r liivriagranime delivered at the 

 pitJ. The principal places ot coniuniption are Aix, Mar- 

 i'eilles, and the neighbouiiiood. They are tranlporled by 

 land carriage in carls. 



Thefc coals eafily pulverize. They niuft not be long left 

 expofed to the air. When they have been totally reduced 

 to dull by the aclion of the atniofphere, or the elTe<^i of car- 

 riase, they lofe alnioll entirely their combullible properly. 



The very high price of wood in this country ought to pro- 

 duce much greater care in the working of thei'e coal mines. 

 It is probable that better products would be obtained ; and 

 even in cafe the lower itrala (liould not prefent coal of the 

 beft oualitv, the longer continuance of the exlraclion might 

 be enfured. 



Subterranean fires have already deftroyed a part of the 

 flrata of the coals of this country, and particularly at a place 

 called la Galere; at another mine not far diitant the Itrala took 

 fire, and have been burning for feveral years. 



Department of Calvados. 



A coal mine (11) is worked in the commune of Litry, in 

 the canton of Bavnes. It furnithes from four to five niillions 

 of myriacramnies of coal of the beft quality, the greater part 

 of which is confumed in the country. x\ confiderable quan- 

 tity, however, is exported by the port of Ifigny ; and this 

 mine, durinn; the war, was a valuable refource to the ports of 

 Cherbourg, Havre, and Honileur at the mouth of the Seine; 

 and for the manufactories of arms w hich were put in a ftate 

 of acl:lvilv at Saint-VRlery-fur-Somme. The price of coal? 

 at the mine varies from 13 to 25 cents, according to its 

 qualitv. 



Great praife is due to the renters of the mine of Litrv, who 

 ufe every exertion to give proper a6livily to this enterprife. 

 In the year 9 they ere^ffed there a fteam-engine,- which ex- 

 haufts the water and at the fame time draws up the coals. 

 This machine was conftruCled by C. Perrler. It anfwers the 

 purpole exceedingly well. It faves at this mine eighteen 

 horl'ts dailv ; and confumes about 50 myriagrammes of 

 'coals. It is much to be wifhed that the ufeful example fet 

 by the renters of the mine of Litry were imitated in other 

 enterpriles of a fimilar kind. I have been aflured that the 

 renters of the mines of Anzin, in the department of the 

 North, are (Toinsr to trcSt limilar engines at their works. 



The coal nune of Litry is the only one now worked in the 

 department of Calvados. Searches have been made in feveral 



places. 



