( 3 9 6 ) 
may be fuppofed a Section from South-Eaft to North- 
Weft, viz. from the Dip to the Rife *, and Fig. 2 . at 
right Angles, from South-Weft to North-Eaft, on the 
Drift or Level. 
I mention this by way of Correftion and Addition 
to my former Obfervations of the Coal- Works in 
So7nerfet[ime. I have fince had Opportunities to be 
underground, and view feveral Coal-Works in Scot- 
land and Northumberland. , and to obferve the feveral 
Strata there. At JViddrington they have four Fathom 
Clay, then a Seam of Coal, about fix Inches thick, not 
worth working • then a white Freeftone ; then an 
hard Stone, which they call a Whin j then two Fa- 
thom of Clay j then a white foft Stone } and under 
that a Vein of Coal three Feet nine Inches thick. 
This is a fmall Coal of the fame Nature, but not fo 
good as the Newcaflle-Coal which comes to London 
Market. Thefe Veins dip to the South-Eaft, one Yard 
in twenty. Near Tranent , in Eajl-Lothian in Scot- 
land, the Coal dips alfo to the South-Eaft, in the 
fame Proportion } but at Baldoe , in the ParHh of 
CampJ), three Miles from Kylfitb , it dips to the 
North-Eaft, and at Madejione , near Falkirk , to the 
fame Point, and in the fame Proportion. The Strata 
of Earths and Minerals, at thefe Places, agree very 
near : They have, as the Ground rifes or falls, one, 
two, or three Fathom of Clay j then eleven Fathom of 
Slate, or Coal-Clives * one Fathom of Limeftone *, un- 
der that two Fathom of Slate, Earth and Stone ; and 
then Coal. And all thefe agree in this ^ that the 
Pits generally need no Timber, and have a good 
Roof, & which is fupported by Pillars of Coal, which 
they leave in the working. At Baldoe , the Coal is 
commonly forty-five Inches thick j and ail along, for 
fome Miles Eaftward thence, on the Sides of the 
Hills, 
