136 Questions relative to Mineral Veins. 
7. If copper lodes ; do they consist of yellow or gray ore, or of 
any other variety, and how are the varieties of the ore situated with 
respect to each other in the lodes? 
8. If copper and tin occur in the same lodes, are those metals in 
different parts of them, or if near together, are they at, or near the 
opposite walls of the lodes, or are they intimately mixed? . 
_ 9. If near the opposite walls of underlying lodes, which of these 
metals is the nearer to the upper or hanging walls, and which to the 
lower or foot walls ;—are these ores separated from each other by 
« spar’’ (quartz,) or other substances ; and do the hanging and foot 
walls differ much in hardness ? 
10. If other metals exist in the lodes, under what circumstances 
do they occur; and what minerals have a tendency to crystallize, and 
how are the crystallized masses situated with respect to the contiguous 
ores ? , 
11. Was there “ gossan’’ or other substance observed resting 
upon, or above the copper ore in the lodes, or if strictly tin lodes, 
were they found to be without gossan ? 
12. Are the walls or “ capels” of the tin lodes harder than those 
of the copper lodes, and if in the case of a copper lode, one wall is — 
harder than the other, is it the nearer one to the copper ore, or that 
which is the further from it ? 
13. Are the lodes, generally speaking, most productive of ore on 
the side of the hanging, or of the foot walls? 
14. Is the rock or country immediately contiguous to the walls 
of any of the lodes, usually softer or harder than at a distance from 
them ; is there any difference in this respect between tin lodes, and 
lodes of copper, &c.; and is the hardness or softness of the lodes, 
in any dérect ratio or inverse ratio, to the hardness or softness of the 
rock or country contiguous to the walls. 
15. Are not the lodes often contracted into small veins or branches, 
and have any of these been found to open again into large lodes 
containing ore? In such cases, do not the opposite small veins or 
branches sometimes overlap each other, or become “ spliced,” as I 
believe it is termed ? 
16. Do the lodes materially vary in size in traversing different 
rocks, and in which rocks are they the largest? Moreover, in pass- 
ing from one rock into another, from killas, to elvan or granite, for 
instance, do they suffer any interruption, "s break in their course, 
and if so, how much, and in what direction 
