1893. | NEW YORK ACADEMY OF SCIENCES. 85 
belong to the Lehigh Company, but the mine is commonly 
called the Trotter. It is the great source of rare minerals. The 
New Jersey Company, no longer operate the front vein, but 
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Fic. 4. MAP OF FRANKLIN FURNACE. 
mine only the back one. This mine is called the Buckwheat 
or Taylor, and is far the largest and richest of all. Just as the 
ore pitches below the surface it is cut by an interesting trap 
