28 MINERALOGY AND LITHOLOGY. 



bear in mind that no marked success has ever yet attended these opera- 

 tions. The galenas that are found in these highly crystalline regions are 

 often quite rich in silver ; and, as rich ores have been found in this 

 state, the zeal in searching for them has always been active. The trouble 

 has never been that the ores were poor, but that the amount of ore 

 was small and its extraction difficult ; hence there are many places, as, 

 for example, Shelburne, Warren, and Madison, where the surface indica- 

 tions were flattering, and extensive operations were begun, but where 

 the money expended was lost, and the workings long since abandoned. 

 All over New England such abandoned mines are to be found. These 

 facts should be remembered by those who are tempted to place great 

 expectations upon every new discovery of silver-bearing ore, for experi- 

 ence teaches that the success of silver mining in New Hampshire is so 

 doubtful that no money should be expended in working veins, unless it 

 is done under the advice of skilled and experienced scientific men. 



As localities where galena may be found, may be mentioned, in par- 

 ticular, Madison, Shelburne, Warren, Enfield, Haverhill, Lebanon, Bath, 

 Orford, near White pond in Tamworth, Meredith, Surry, Orange, Wood- 

 stock, Rumney, Lyman, Lisbon, Dalton, Pittsfield, Loudon, Ellsworth, 

 Alton, Connecticut lake, and Gardner mountain; and it may be stated 

 to be common in small quantities scattered through the rocks in general. 



Galena can be recognized by its bright cubic cleavage planes, though 

 at times it becomes nearly massive and intimately mingled with other 

 sulphides, and at times it is merely seen as shining particles in the rocks. 

 The following is an analysis of galena from Warren, by Jackson : 



Lead, , . . 83.48 



Silver, ............ .20 



Sulphur, 16.32 



100.00 



The ore of which this was a sample would yield 58 ounces of silver to 

 the ton. Such an ore, under favorable circumstances, can be profitably 

 worked. The galena from Madison was assayed by Mr. C. A. Seeley, 

 and from that he obtained 94 ounces to the ton, a quite favorable result, 

 so far as the quality of the ore is concerned. Assays of the ore that has 

 been extracted from the Newburyport mine have been reported as much 



