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and permission to inspect the seam underground I am indebted 
to the owners, (Messrs Guo. Inson & Son.) and to the manager 
of the Cymmer Colliery, near Pontypridd, South Wales. At 
this Colliery the “Four Feet” presents the following section:— 
SECTION OF THE FOUR FEET SEAM, CYMMER COLLIERY, - 
NEAR PONTYPRIDD, SOUTH WALES. 
DESCRIPTION Ft. In. STRUCTURE 
Top Bed. Coal brittle, with Carbonized vegetable tissue, 
bright lustre... ewe 2 0 with a little hydrocarbon. 
Minature underclay. Stig- 
maria (?) 
Oo 
Argillaceous Parting ... ... | 1 
Highly carbonized vegetable 
Middle Bed. Medium lustre | 4 6 
tissue. 
Argillaceous Parting ... ... | 0 5 Minature underclay. 
2 0 Close under the parting well 
Lower Bed... 1. ve vee preserved scalariform tissue. 
Sections from the centre showed 
numerous spores, spore cases 
and structerless vegetable tissue. 
Argillaceous Parting ... ... 0 2 Stigmaria 
Bottom Bed ... rk ves 1 6 Inferior Coal, not worked. 
Wiiderclay .02  3e) a vcey cose 4 0 Stigmaria. 
From the fact of this seam being termed the “ Four Feet” 
persons may be led to regard it as four feet of Coal only; 
that, however, is not the case. The above section shows 
the. seam to be made up of four distinct beds. The lowest 
one, unfortunately, I have not had an opportunity of examining. 
The top bed of all is mainly a mass of carbonized vegetable 
tissue, with a little hydrocarbon, but the coal was so brittle 
that no very satisfactory slides were mounted, though a fair 
idea of the structure was gained during the process of en- 
_deavouring to prepare them. The bed, four feet six inches 
thick, following in descending order, is the chief one of 
