HISTORY OF GEOLOGICAL SURVEY. 1 9 



well as unctuous. They bound the clay slate on the west side, near the Dodge mine ; 

 while near their eastern limit is the auriferous quartz vein described as the property 

 of the New Hampshire Gold Mining Company. The color and aspect of this group 

 change in proceeding southerly. 

 8. The Copper Belt. 



Upon the map is a section from Bronson's lime-kiln to the Connecticut 

 river, near Stevens village, in Barnet. The dips and general arrangement 

 are the same with what will be described hereafter. Two faults are rep- 

 resented, whose extent, but not existence, may be somewhat modified in 

 future descriptions. / 



Copper Mines. Next, a considerable space is devoted to a description 

 of numerous copper veins, chiefly along Gardner's Mountain range. The 

 general conclusions then reached have been confirmed by subsequent 

 researches. Only the conclusions need be referred to in this sketch, as 

 the details will be given hereafter. 



In brief, it may be said of the Gardner Mountain range of copper veins, 

 that they consist of schists charged with the sulphurets of iron and cop- 

 per, averaging less than five per cent, before concentration ; that they are 

 conveniently situated with respect to drainage and to water-power. As 

 several mines are contiguous, adits, mills, and tramways might be con- 

 structed for the mutual benefit of several proprietors, with a comparatively 

 small proportionate outlay for each. It was understood that some of these 

 proprietors had arranged for the concentration of the ores at the new mills 

 soon to be constructed in the west corner of Lisbon. The working of 

 these copper veins, if conducted with prudence and wisdom, will undoubt- 

 edly be remunerative ; and when the enterprise is fairly inaugurated, a 

 large number of workmen will be employed, and a new impetus given to 

 the industry of the whole community. 



Miscellaneous Topics. Other topics treated of were the zinc or copper 

 mine at Warren ; the nature and extent of peat deposits ; an enumeration 

 of beds of limestone suitable for manufacture into quick-lime ; agricultural 

 deductions for the Coos region ; economical statistics and statements 

 about the museums. Great interest in the survey among the people was 

 also spoken of. This manifested itself very pleasantly in acts tending to 



