140 Prof. Johnson’s Report on the Bradford Coal Field. 
*‘ The ashes are dense, and of a grayish white color. 
“No. 3. This sample is from the second ply of the same bed, the thick- 
ness of which is two inches. Its specific sisied is 1.4651, 
At 220° it loses of moisture, - 
At pesunes it is BecePNN. giving of water, 
of 
It contains of carbon, - - 
And of earthy matter, - - - 
S, 
1.2 per cent. 
5 7 eé 
122.2 
639 =.= 
Lt. = 
100.0 
“The ashes are light, and have a white color, very slightly inclining to 
uff. 
‘““No. 4. This sample of coal was taken from the old drift of Miller’s 
opening, north-west of the head of Fall creek, and from the middle coal 
of that bed, which is 19} inches thick. Its structure is somewhat irregu- 
lar, inclining to rhombic, and its color rusty brown. 
The surfaces of de- 
position present distinct traces of vegetable fibres in the state of charcoal. 
Its specific gravity is 1.3771. 
Tt loses in moisture at 220°, - - 
At a red heat it parts with water, - 
And of combustible and other gases, - 
It contains of vod fees materials, - 
And of carbon, . GES 
2.5 per cent. 
$0: = 
10 
1542 
63,12 
109.0 
“The ashes of this coal are almost perfectly ee or but very slightly 
inclining to buff. 
*“ No. 
5. This specimen is from the lower part of the upper 32 inch ply 
of coal in Miller’s old drift, and possesses a cubical structure, with a spe 
cific gravity of 1.3784, 
It possesses of hygrometric moisture, - 
Water given out in coking - 
‘ Gas volatilized by bred zed heat, - 
Carbon, - - 
ees - Bis eck TS 
- 1.0 per cent. 
- BBs" 
- 147 ~% 
- 65.5: 
- 153. > 
100.0 
“The ashes are moderately light, and of a gray color, compounded of 
white and chocolate. 
** No. 6. This sample was likewise from the upper, or 32 inch ply of coal 
in the old drift before mentioned. It possessed the cubical structure, and 
fine deep black color. Specific gravity 1.3492. 
=e 
aa 
