COMMUNICATIONS. 607 



Silica, 15.12 



Moisture and loss, 2.65 



100.00 

 One hundred parts of this ore ought to yield thirt;y .eight 

 of pig-iron. 



NO. n, "BAD LOWER BED." 



This ore i? in small nodules, of loose texture, of a greasy feel, 

 and chocolate color. The powder of this ore heated to 212,'' 

 lost four per cent, of its weight. 

 Specific gravity, 2.352. 



Peroxide of Iron, 35.74 



Carbonate of Lime, 1.15 



Carbonate of Magnesia, 10.00 



Peroxide of Manganese, 5-43 



Phosphoric acid, a trace. 



Alumina, 24.38 



Silica, 19.15 



Moisture and loss, 4.15 



100.00 

 One hundred parts ought to yield thirty-five of pig-iron. 



NO. Ill, "BEST UPPER BED." 



This and Nos. IV and Y are in small flattened grains of a 

 dark brown color. Powder heated to 212" lost two per cent. 

 Specific gravity 2.941. 



Peroxide of Iron, 77.34 



Carbonite of Lime, 0.55 



Carbonate of Magnesia, 0.64 



Manganese, 3.50 



Phosphoric Acid, 1.75 



Alumina, 5.00 



Silica, 8.57 



Moisture and Loss, 2.65 



100.00 



