Big Copper Find Near Duluth.The northeast quarter of section 24, 51,12, twelve miles northeast of Duluth, says the Newa-Tribune, is the location of what John DeGrace claims is as rich a fiucl of copper as ever was made on the mineral range. DeGrace, Phillip LuFebre and Bert Perry, fellow explorers, have sunk n shaft 28 feet and drifted five feet iuto the vein. The quartz on the dump is said to have assayed to the ton, and as this is from the surfaceexpectations of what the vein properwill develop are rather high.The three explorers began the investigations about the tune the French ltiver Copper Mining company abandoned its wprk on the same property. They found much float copper and say that at last they locatod a copper vein, which they traced for four miles from the lake shore. They sold an option on their lease to W. J. Holmes and W. G. Joerus, and were thep employed in4showing up what tl^ey had struck. De-Grace says that they have now received instructions from the option holders to discontinue exploratory work and that machinery will be put in at once for S active mining operations.