Questions relative to Mineral Veins. 137 
i7. Are there any marks in the walls of a given lode, showing 
that one of its walls is at a lower level than the other, and, if so, to 
what extent; and is it not usually the hanging wall which 1s so cir- 
cumstanced ? 
18. Are all or any of the walls, smooth and well defined, or are 
they imperceptible or indistinctly marked? In either case, are the 
lodes more or less hard than the ground in which they occur? 
19. Are the hanging or foot walls most indistinct, and which of 
them are the hardest ? 
20. When the tin lodes meet other lodes, are they intersected by 
them, and if the intersections take place in their underlie, are they 
thrown up by them, and how much?—The same question may be 
asked as it respects other lodes. 
| 21. Are there smaller veins having distinct walls or divisions in- 
cluded between the walls of the lodes, that is, are the lodes ‘“‘ comby”’ 
near the surface, or at a greater depth, and are such small included 
veins parallel, or oblique, as it respects the walls of the lodes, and 
of what do the former consist ? 
Q2. Are there any veins of clay, or veins, or portions of the con- 
taining rock, or country, in the lodes, and are they respectively near 
the hanging or the foot walls? 
23. Have any masses of rock been found in the lodes, termed 
‘¢ horses” by the miners, and did they appear to be completely sep- 
_ arated by the branches of any given lode from contact with the outer 
walls or country ? 
24, What circumstances or appearances in the lodes are consid- 
ered the most favorable indications of any given ore, and what the 
least so? 
25. Is not an increase in the underlie of lodes usually less favor- 
able for ore than when they become more vertical, and are they not 
generally more contracted in size, and more filled with mechanical 
deposits when their underlie is considerably increased ? 
26. If any of the lodes have crossed or intersected other lodes, 
has it occurred. horizontally, or in their underlie, and at what angles ; 
and have they been found more productive of ore at the intersec- 
tions, or less so? 
27. At what depth below the surface have the een lodes been 
found most productive of their respective ores; and have many cavi- 
ties, or ‘‘ vowghs’” been observed in them, and at what depths ? 
Vol. XXXIU.—No. 1. 18 
