No. 50.] 
285 
the rock at both extremities ; that it is not discontinued, is proved by- 
excavation at numerous places at the northern and southern extremities, 
where it may be seen passing beneath tabular masses of the hypers- 
thene rock. The shape of the vein, which has been exposed, is nearly- 
triangular. 
SECTION XIY. 
Explanation of the Middle Section, and description of the Ore at dif- 
ferent points. 
1st. Middle transverse section. Commencing at the western limit, or 
at the base of the hill, and proceeding nearly eastward, or at right an- 
gles to the vein. 
First excavation. No. 1. Fine granular feldspar, intermixed with 
iron, garnet and hornblende. 
2nd. 36 feet from No. 1. A rich ore, breaking into tabular masses. 
3rd. 10 feet from No. 2. Rich ore, as above. 
4th. 15 3. A rich ore. 
5th. 20 " 4. A rich ore, mixed in a small proportion 
with granular feldspar. 
6th. 12 feet from No. 5. Granular feldspar in a decomposing state, 
containing only a small proportion of ore. 
7th. 20 feet from No. 6. Rich ore, mixed with a few scales of black 
mica and feldspar. 
8th. 22 feet from No. 7. Rich ore, mixed with garnet and feld- 
spar. 
9th. 24 feet from No. 8. Nearly the same as No. 8, but brighter. 
10th. 24 " 9. Rich ore, with very small proportion of 
feldspar. 
11th. 22 feet from No. 1 0. Loose decomposed rock. 
12th. 17 " 11. Rich ore. 
13th. 15 " 12. Rich ore, with feldspar. 
14th. 39 " 13. A rich granular ore, with a resinous 
lustre. 
15th. 15 14. A lean ore. 
16th. 22 " 15. Principally rock. 
17th. 28 16. A pure ore. 
18th. 35 17. A pure and rich ore. 
19th. 36 " 18. A rich ore. 
20th. 22 19. A pure oxide. 
21st. 27 " 20. A pure ore. 
