608 ' WISCONSIN AGRICULTUEE. 



100.00 



Note. — This Is the ore now used at the Mayville Iron Works It is shoveled from the loose 

 bed into waggons, and from thence directly into the furnace without any preparation or admix- 

 ture of clay, lime, or other substance. i. a. l. 



One hundred parts of this ore ought to yield seventy-five 



100.00 

 One hundred parts of this ore ought to yield seventy-three 

 of pig iron. 



NO. YI, "BAD UPPER BED." 



This ore is of a grey color, hard, compact, and granulated. 

 Specific gravity, 3.163. 



Peroxide of Iron, 35.32 



Carbonate of Lime, 3.28 



