198 
On certain Varieties 
Sulphuretted hydrogen. 1' 
Carbonic acid. 5* 
Olefiant gas. 19* 
Carburetted hydrogen. 11* 
Other inflammatory gas . 64* 
Analysed with peroxide of copper, the quantities of its 
ultimate elements, when earthy matter is abstracted, 
will stand in the following proportion:— 
Coal of the Upper Scam. 
Carbon . 72*2 
Hydrogen. 14*4 
Oxygen . 4*6 
Nitrogen . 8*8 
Coal of the Lower Seam. 
Carbon .52*3 
Hydrogen. 17*2 
Oxygen. 14*5 
Nitrogen . 16*0 
Geological situation . —It is found in beds 800 feet 
above the level of the sea, the seam being 1 to 3 feet in 
thickness. A section, partly taken from a chasm above 
the outcrop of the coal, partly from a pit sunk below, 
presents the following various formations accompanying 
that coal in their order descending; from the surface :— 
o 
Feet. 
1 Yellow sandstone, with impressions of ferns 13 
2 Greenish sandstone. 3 
3 Grey clay-slate. 1 
4 Grey clay . 2 
5 Blackish clay, with vegetable impressions 2 
6 Coal. 3 
7 Grey clay . 12 
8 Blackish clay, with vegetable impressions.. 3 
9 Grey clay . 11 
10 Blackish clay, with phcenogamous plants .. 6 
11 Coal. 2 
JERICHO, TASMANIA. 
Slate Coal. 
External character .—The same as that of Jerusalem 
(upper seam): specific gravity 1*30. 
