CLINTON COUNTY. 



299 



numerous. Small quantities of green and purple fluor, sulphiu-et of iron, a few crystals of 

 lime, comprise the principal simple minerals at this locality. 



The arrangement of the substances constituting the veins, as well as those adjacent to them, 

 is in alternating layers. Numerous specimens are deposited in the State Collection, illus- 

 trating their order. 



Palmer Vein. 



The history of the working of this vein is interesting, on account of the difficulties which 

 have been experienced in finding the main vein. Ore disseminated in the rock had been raised 

 for many years, but the quantity varied greatly, and generally it was too lean to be profitably 

 worked previous to the discovery of the regular vein. The difficulty of finding this, arose 

 from disturbances by dykes. The following diagram will explain the points which I wish to 



present and illustrate : Fig. 78 is a vertical section of the rock, dykes and vein ; a, a, a, a, 

 green stone dykes ; c, c, spaces between the dykes, in which ore is disseminated in the rock ; 

 b, ore, in greater abundance; d, the main vein. In the space h, for a number of rods north 

 and south, ore had been raised ; but it was uncertain in amount : sometimes for a few feet it 

 was rich, and again it became lean and unprofitable. After raising all which was at all possi- 

 ble on the score of economy, up to the wide dyke, it appeared necessary to abandon the vein. 

 It was, however, proposed to cut through the dyke, which was known to be fourteen feet 

 wide, and see what was beyond it. The result was the discovery of the main vein. At the 

 time of my visit, it had been opened about thirty-five feet, which appeared to be then its 

 thickness. A fact worthy of special notice, is the great amount of ore, but a small distance 

 below the surface ; while but a small quantity, in distant particles, appeared in the rock upon 

 the surface. In fact, passing over the vein, no indication of its existence can be discovered 

 in the rock, except a few scattered particles of ore. To illustrate the interesting relations of 



