1844.] 421 



Incineration. 

 6-44 grs. gave of Ash, 0-28, or 4-34 per 100. 

 2-26 grs. do. 0-11, or 4-86 do. 



Mean - - - 4-60 do. 



2. Mauch Chunk, or Pennsylvanian Anthracite. Lustre somewhat 

 glistening ; powder much blacker than that of the preceding variety. 



1st Analysis. 

 6*92 grs. gave 



Water, 1-50 = Hydrogen, 0-166, or 2-398 per 100. 



Carbonic Acid, 21-44= Carbon, 5-847, or 84 49 do. 



2d Analysis. 

 6-02 grs. gave 



Water, 1 -33 = Hydrogen, 0-147, or 2-441 per 100. 



Carbonic Acid, 1 8 -75 = Carbon, 5-113, or 84-93 do. 



3d Analysis. 

 6-127 grs. gave 



Water, 1 -41 = Hydrogen, 0-156, or 2-546 per 100. 



Carbonic Acid, 19-11 = Carbon, 5'21 1, or 85-04 do. 



Nitrogen Analysis. 



I heated some of the coal on a test-tube with soda-lime. Red litmus paper 

 was immediately turned blue ; and, on holding the stopper of the hydrochloric 

 acid bottle over the tube, dense white fumes appeared. The coal, therefore, con- 

 tained nitrogen. 



7-18 grs. gave 



Metallic Platinum, 0-616 = Nitrogen, 0-0874, or 1 -217 per 100. 



Incineration. 



18-17 grains gave of Ash, 1-85, or 10-18 per 100. 

 6-75 do. 0-69, or 10-22 do. 



Mean . - . . 10-20 

 3. Frostburgh, Maryland. Colour of powder, brownish black. 



\st Analysis, 

 4-85 grs. gave 



Water, 2-10= Hydrogen, 0-233, or 4-804 per 100. 



Carbonic Acid, 13-91 = Carbon, 3-793, or 78-20 do. 



2d Analysis. 

 6-54 grs. gave 



Water, 2'92 = Hydrogen, 0-324, or 4-954 per 100. 



Carbonic Acid, 18-89= Carbon, 5-151, or 78-76 do. 



3d Analysis. 

 5-889 grs. gave 



Water, 2-45= Hydrogen, 0-272, or 4-618 per 100. 



Carbonic Acid, 17-03 = Carbon, 4-644, or 78-85 do. 



Nitrogen Analysis. 

 6-83 grs. gave of 



Metallic Platinum, 1-145 = Nitrogen, 0-162, or 2-37 per 100. 



I I 2 



