» 
2D 
x 
Anthracite . . 
Semi-anthracite 
High carbon bity- 
minous 
Bituminous 
Low carbon -. 
Cannel 
Sub-bituminous 
Lignite . 
Physical Properties. 
Short blue lame 
Short flame ; non-coking 
Short flame ; non-coking 
Luminous flame ; usually 
cokes 
Long flame: cokes 
Long smoky flame : cokes 
Streak brown or yellow 
fracture conchoidal 
Streak the same; frac. 
ture earthy. Splits a- 
long bedding: fibrous 
structure 
Volatile Con- 
stituents. 
35% 
7-12 9%, 
12-15 % 
12-26 9, 
Less than 35 9 
30-40% 
Moisture 
Over 6 9, 
Over 20 9, 
Carbon. 
93-95 % 
90-93 % 
80-90 9, 
75-00 9% 
70-80 9/. 
60-75 9, 
45-65 
of 
Ratio of Fixed Carbon to 
Volatile Matter. 
Over 12—1 
12—% 
A—y 
[+2—Y 
(Ratio of fixed carbon 
+ % volatile matter 
to hygroscopic mois: 
ture 4+ 4 volatile 
matter.) 
2°5-3°3 
[+8-2°8 
B.T.U. 
14,500-15,000 
15,000-15,500 
15,200-16,000 
14,000-16,000 
12,000-14,000 
12,000-16.000 
[0,000-1 3,000 
7000-1 1.00" 
= 
OQ 
A 
a. 
bod 
-~ 
@ 
= 
Qo 
— 
oO 
9) 
[oe