120 \YILLIAM SMITH ! HIS MAPS AXD MEMOIRS 
I I Red Marl, Millstone and Breciated (sic) Limestone. 
j I Magnesian Limestone. 
\' I Coalmeasures — Penant paving Grindstones and Mill- 
stones. 
4. 4. 4. 4. The Coal. 
Resting on Sandstone. 
I I Derbyshire Limestone. 
I ' Red and Dunstone, Brecon and the South Eastern Part 
of Scotland. 
I I Various Alternations of Hardstone, Limestone and 
~ ~ Slate. 
j ' I Killas and Slate of Cornwall, Devon, Wales, Westmore- 
land and Scotland. 
\ Granit (sic) Sienite and Gneiss. 
— Canals marked by strong lines thus. 
Tunnels. 
" " Rail Roads. 
- — Other Roads. 
^ 4, 4. 4. Collieries. 
. • Lead Mines. 
• • • • 
• Copper Mines. 
\ '• Tin Mines. 
• • • 
(Salt and. 
00000 - , 
[Alu7n Works. 
The Figures sheiv the Altitude in Feet above the Level of the Sea. 
Salt Works in the Redland of Cheshire, — Shirlywish near. 
Stafford and Droitwich near Worcester. 
Alum Works,— North York Moors.'' 
