250 GEOLOGY OF THE SECOND DISTRICT. 



III. Description of tlio section which is south from the preceding section, 210 feet. 



No. 1. Rich, black, coarse grained ore, intermixed with a few particles of decomposed hyper- 

 sthene. 



2. Rich ore, similar to No. 1. 



3. Rich ore, similar to No. 1. 



4. Rich, black, compact ore. 



5. Pure granular ore, coated with a greenish substance. 

 G. Rich ore, with slight incrustation of peroxide of iron. 



IV. Description of the section 231 feet north of the middle or main section. 



No. 1. Rock. 



2. Rock, intcrmi.xcd with iron, 



3. Fine grained ore. 



4. Good ore. 

 5. 



6. Pure ore. 



7. Good ore, but intermixed with crystals of hypersthene. 



8. Good ore. 



9. Rock. 



In order to obtain a correct conception of the amount of ore on the Sanford hill, we may 

 >estimatc its solid contents ; or if we merely estimate the amount of ore at the depth of two 

 feet from the surface, we .shall find that it amounts to at least 6,832,734 tons, a large propor- 

 tion of which may be removed or raised without the use of powder. This amount of ore 

 contains at least 3,000,000 tons of iron, of a quality which sells in market for one hundred 

 to one hundred and twenty dollars per ton. 



After what has been said of this remarkable vein of the magnetic oxide, little need be added 

 in relation lo the advantages it presents for exploration. It will be understood that it is easy 

 of access ; that there are no natural obstructions to be overcome in approaching the vein ; 

 and that in one sense it lies open and exposed, as it were, to the light of day, as there is 

 nothing to be removed but a light soil, excepting occasionally boulders which have been trans- 

 ported here in former times. 



The western edge of the vein is two hundred feet at least above the level of the lake, and 

 it rises rapidly towards the east, so that its eastern limit is probably six hundred feet above 

 the lake. A large proportion of the vein is, therefore, situated above the waters of the lake, 

 and under circumstances as favorable for drainage as can be desired, so that water will form 

 no obstacle to mining or quarrying the ore. Again, in conducting the ore to the lake, or even 

 to the works, the surface of the ground is such that a gradual descent may be obtained. In 

 fact, there can be no occasion for raising the ore over any elevation of ground. So favorable 

 is the location, that after it is raised, it may be rolled downwards in cars or carriages, to the 

 lake for transportation, or to the works directly. Also, the ore being unmixed with rock, 

 no labor need be lost in removing worthless stone ; and, as much surface may be at once 

 exposed, all the operations will be conducted in open dayliglit for a great length of time. In 



