Miscellanies. 



383 



Prof. J. remarks : " In comparing the results in the above analyses 

 with those of other experiments on anthracite, I find the average 

 amount of carbon much greater than has heretofore been assigned to 

 that species of fuel. Thus, of twelve species of anthracite analyzed 

 by Berthier, the mean per-centage of carbon was 79.15 ; ashes, 13.25; 

 volatile matter, 7.37." 



No. 5. Sp. grav. 1.6127. Combustible carbonic oxide, and a little 

 carburetted hydrogen expelled at red heat, 3.55; carbon not vola- 

 tilizable by simple heat, 86.06; earthy matter, 3.71 = 100. 



No. 6. Sp. grav. 1.559. Water, .390; gaseous matter, including 

 some azote, volatile at bright red heat, 5.515; carbon, not volatiliza- 

 ble by heat, 91.016; earthy matter and oxides, 3.079=100. 



Iron Ores. — The bed of iron ore from which were taken the sam- 

 ples examined by Prof. Johnson, is found on the southern declivity 

 of the bluff, about forty rods northerly from the south fork of Beaver 

 Creek. The thickness of the bed of ore and shale is seven feet, and 

 it lies seventeen feet beneath the surface of the ground at the point 

 where it is opened. The first variety analyzed gave by the usual 

 assay in the dry way, the following results : 



Water, expelled at 250°, . . . . 0.4 



Carbonic acid, 

 Cast iron, . 

 Earthy matter, 

 Oxygen, 



26.6 

 33.8 

 26.64 

 12.55 



99.99 



The ore has a light bluish ash color, is moderately tough before cal- 

 cination, and has a spec. grav. of 3.247. The pig metal given in the 

 assay is soft, tough, and of a dark gray color. The cinder is a trans- 

 parent, nearly colorless, glass, very fusible, and contains hw adher- 

 ing particles of metal. The use of pure carbonate of lime as a flux 

 in the proportion of one part of this metal to six parts of raw mine, 

 will produce a complete reduction of the ore and fusion of the earthy 

 ingredients. Assayed in the humid way, this ore yields the following 

 results : 



98.42 



