148 Mr. William Phillips on the Veins of Cornwall, 



and south of the east : it produced a considerable quantity of cop- 

 per ore, and varied from one to three feet in width. Near the 

 surface great quantities of blende and iron pyrites were found in it. 

 Wherever it intersected the east and west veins, their contents 

 formed together one load at the junction for about eight fathoms in 

 length and three or four in width. That part of the contre west 

 of the cross vein called the Privateer Flucan was heaved by it north- 

 wards two or three fathoms, and the substances of both were min- 

 gled together. By Harvie's cross course it was heaved eight fathoms, 

 and the substance of the cross course between the divided parts of 

 the contre was found to be nearly twice its usual size, and consisted 

 not of quartz only but of quartz mingled with iron pyrites, blende 

 and copper ore, so that both the cross course and the contre in 

 pare lost their peculiar characters. The contre continued both N.W. 

 and S. E. beyond its working, but was poor. 



The substances of the numerous north and south veins or cross 

 courses of these mines were quartz or flucan, or both. By the 

 ground plan some variations will be observed in their directions, as 

 being more or less to the west of north and south of east : it will 

 also be seen that their general effect is to alter the course of the 

 veins they traverse, by heaving, in the phrase of the miner, the 

 western parts of them higher north, but with some exception, for 

 the reverse was the fact in respect to those parts of the Manor Old 

 Load and Middle Mine Load traversed by Chambers's Flucan and 

 the Great Cross Course. 



The discovery of silver in one of the north and south veins of 

 these mines has already been made known by the publication of 

 Mr. Hitchins's paper on that subject in the Philosophical Trans- 

 actions. It may how^ever not be amiss to take some notice of that 

 peculiar circumstance. It was found in that part of Convocation 



