316 DESCRIPTION OF THE TIN VEINS 



mediately upon, and for some distance above, the coal. In some 

 localities the rhombic scales occur in immense numbers, blended 

 with vegetable impressions, not only in these beds, but in the 

 upper part of the coal itself. The teeth I have found both in the 

 finer grits, and associated with the fish scales immediately upon, 

 and in, the coal. 



Description of the Tin Veins of Jackson, N. H. By 

 Charles T. Jackson, M. D., State Geologist. 



A few minute and scattered crystals of oxide of tin had been 

 noticed in the albite rock of Chesterfield, * and in a block of 

 granite at Goshen, t anterior to the discovery of the tin veins of 

 New Hampshire, which are to be described in the present me- 

 moir. We have been informed by Prof. W. B. Rogers, at this 

 meeting, that a few scattered crystals of this ore were observed 

 in the auriferous veins of Virginia. No regular veins of the 

 tin ore have been found at any of the above-mentioned localities. 

 I have the satisfaction of announcing to the Association, that in 

 1840 I discovered several regular veins of the oxide of tin in the 

 town of Jackson, N. H., on the estate of Mr. William Eastman. 

 I have laid before you specimens of the ore, and an ingot of the 

 metal extracted from it. Also, specimens of the accompanying 

 or associated minerals which occur in the tin veins. 



The locality where these ores are found, is situated on a hill a 

 little to the eastward of the White Mountains. The rocks which 

 compose the mass of the hill are mica slate, gneiss, and granite, 

 with occasional dykes of compact and porphyritic greenstone trap. 

 The stratified rocks run in a northwest by west and southeast by 

 south du'cction, and dip to the northeast by cast thirty degrees. 



* See Haidinger's Translation of Mohs' Mineralogy, Vol. II, p.3b7, Edinburgh, 1S25. 

 t See Prof. Hitchcock's Report on the Geologj' of Massachusetts, page 74. 



