64 Mr. Weaver on the Geological Relations of the South of Ireland. 



operations ; but those which have been carried on, afford some instructive ex- 

 amples of the modes^ in which metal is lodged in the formation. 



(78.) The Annagh Mine near Castlemaine was discovered about the year 1788, wrought during 

 three years, and then abandoned. Two years afterwards the works were visited by Mr. Raspe, 

 a German miner of reputation, who left a written report dated 4th October, 1 793, the sub- 

 stance of which is, " that the mine having yielded 400 tons of argentiferous galena, of the 

 " value of 15f. to 17^. per ton, from workings which did not exceed twelve fathoms in depth ; 

 " and great lumps and masses of ore, lead, and spar, left in the hillocks affording additional evidence 

 " of a valuable deposit, he strongly recommended a resumption of the undertaking, though 

 " doubtful whether the operations had been conducted on a bed or a vein." 



The works were accordingly resumed in the year 1825, and the general results may be seen ia 

 the subjoined plan and sections. 



Plan of Annagh Mine, near Castlemaine. 



20 fathoms level. 



10 fathoms leveL 



15 fathoms level. 



1. Engine Shaft. 



2. Spar Shaft. 



3. Old Shaft. 



5 10 15 20 



Scale 10 fathoms to an inch. 



Annagh Mine, longitudinal section. 



Annagh Mine, transverse section on the 

 line J Bof: the Plan. 



^ 



LJ 10 fathoms level. 



