88 



THE PENOKEE IKON BEARlNd SERIES. 



The iiiiues already opened and worked show a liiyh grade of red lieiiialite ores, 

 most-of whieli :ire strictly of the Bessemer c^lass, the balance of the ore preparctl for 

 shipment beiiiy rich in iron and close to the Bessemer limit in idiosphonis. \Vliile 

 some t>res higii in manganese are ndned, 7ione can be said to be high in iihosjiliorus, 

 and it is donbtfnl if the run of any ol' the develo])ed i)roperties would show 1! jiarls of 

 phosphorus in 1,0(10 ol' iron, it may be asserted as a rule that where the ore lies in 

 large masses but little of it will require sorting, aiul even in mining the ])roportion of 

 lean ore and foreign material is in.signiticant, except near the conliuing walls or where 

 "horses" of rocdi occur. These "horses" are by no means uncommon, and are found 

 in mo.st of the mines now exten.sively opened, but they are not a cause for discourage- 

 ment; for already after jiassing through a "horse" ore has been found below it, or the 

 projection of a "horse" into the ore body has a|)parently forced the ore in front of it. 

 A fact of ai)i>areiit similarity to the idder regions Is in the grouping of the laige pro- 

 ducers along a conipaiat i\ civ lindted strike, and it is prol)able that the Gogebic 

 range will show the great proportion i>\' its future shijiments made from a few large 

 mines. . . . 



The appearance of the ores from the \arious mines and in some cases froiM the 

 same mine differs materially both as to coloi- and hardness. The colors are nearly 

 black, blue black, brown, and almost brick re(l; the hardness varies from a soft mass 

 of finely comminuted ore to compact lumps, and occasionally giape, needle, or kidney 

 forms, with brilliant surface. . . . 



From the Grogebic mines the following amounts were shii)])ed iu the first and 

 second years of develoimient: 



I'rodiKtiiiii iif iniii iins J'riim tin IciidiiDi (liifiihif mints in 7,s'\.:7 mill JS86. 



Between the eastern and western extremes of jiractical exiiloration ujion the 

 tTOgebic iron range the distance is fully .'50 miles, but the pi-operties held as iron lands 

 extend to the east and west of these extremes. The leal work of development to date 

 is covered by a distance of about liO miles along the ridge. 



