138 Questions relative to Mineral Veins. 
28. Have the arseniates of copper, iron, or lead, or much fluor 
spar, occurred in any of the lodes; and how were such substances 
situated in relation to the ores? 
29. Is the “spar,” or quartz immediately contiguous to copper 
- ore, often more porous or friable, (locally termed “ honey comb or 
sugary spar,”) than that which accompanies tin ore, and even more 
so, than the spar which is at a distance from the copper ore in the 
same lode? 
30. Are there any cross courses or flucans intersecting any of the. 
lodes, and what are the directions by compass, underlie, and average 
sizes of the former; and are they larger or smaller at the upper than 
at the lower levels? 
31. Are the cross courses “ comby,” or subdivided into smaller 
veins of clay and quartz, or other earthy matter? 
32. How far do the cross courses partake of the nature of the 
country through which they pass? 
33. Do they dislocate or heave the lodes and elvan courses, and 
how much each of them; stating the underlie of the two last, at or 
near the places of intersection; and are the heaves greater or less 
at the upper than at the lower levels? 
34. Are there any branches, small veins, or ‘‘ leaders” of ore in 
any of the cross courses between the dislocated extremities of the 
lodes, or only detached stones of ore ; and are the ores in the cross 
courses the same, or different in thei nature or appearance from 
those in the lodes? 
35. Are the lodes more productive of ore near the cross courses, 
and on both sides, or only on one side of a given cross course, and on 
which side ? 
36. Are there any branch veins s of ore nearly at right angles to 
the bearings of the lodes ;—of what ores do such feetanaulal veins 
consist;—how far have they been seen to extend; what is their un- 
derlie ;—and are they near the hanging walls of any cross courses * 
37. Are there any beds, or “‘ floors’’ of tin, copper, or other metal, 
and under what circumstances do they occur? 
38. Have they walls like lodes, or are they interposed between 
the beds or lamine of the rocks? 
39. Are they connected with other veins, or quite distinct from 
them ; in what rocks or country are they most prevalent ;—and have 
any of the ores been observed to occur disseminated, or diffused’in — 
the rocks, not as veins, but at a distance from lodes or beds of ore? 
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