WILLIAM SMITH : HIS MAPS AND MEMOIRS 
139 
" Oval, pointed at one end, high ; rays biporous two-thirds of 
the height downwards froni the apex ; arcse flattened." 
Of these tables Phillips records that they were " the first of the 
kind ever piibHshed."* 
Comparison of Smith's Tables of Strata. 
The following shows the differences in the tables of strata drawn 
up by Smith between 1799 and 1816. It is taken from Phillips's 
*' Memoirs," page 146 : — 
Table drawn up in 17'.»9. 
Table, accompanying the Map 
drawn up in 1812. 
Chalk . 
Sand . 
3. Clay 
Improved Table drawn up in 
181.5 and ISlO, after the first 
copies of the Map had been 
issued. 
London Clay 
Clay or Brick-earth . 
Sand or Light Loam 
Chalk 
Green Sand 
Blue Marl . 
! 1. 
Purbeck Stone, Kentish Rag. 
and Limestone of the vales 
of Pickering and Aylesbury 
Iron Sand and Carstone 
Dark blue Shale 
Sand and Stone 
Clay 
Forest Marble . . 
Cornbrash 
London Clay. 
Sand. 
Crag. 
Sand. 
Ch-ilk i L'pper. 
^^^^^ { Lower. 
Green Sand. 
Brick-earth. 
Sand. 
Portland Rock. 
Sand. 
Oaktrec Clay. 
Coral Rag and Pisolite. 
Sand. 
Clunch Clay and Shale. 
Kelloway's Stone. 
Cornbrash. 
Sand and Sandstone. 
Freestone 
Blue Clay 
Yellow Clay 
Fuller's Earth 
Bastard ditto and Sun- | 
dries 
Freestone 
Sand 
Forest Marble Rock i 18. 
19. 
Great Oolite Rock 20. 
Forest Marble. 
Clay over Upper Oolite. 
Upper Oolite. 
21. Fuller's Earth and Rock. 
Marl Blue 
Blue Lias 
White Lias 
Marlstone, Indigo and 
Black Marls 
Red Ground 
Millstone 
Pennant Street. 
Grays 
Cliff 
Coal 
Under Oolite 
I 24. 
Blue Marl . 
Blue Lias . 
White Lias 
Under Oolite. 
Sand. 
Marlstone. 
Blue Marl. 
Blue Lias. 
White Lias. 
Red Marl and Gypsum 
Magnesian Limestone . 
Soft Sandstone 
28. 
Red Marl 
Redland Limestone. 
Coal Districts 
Derbyshire Lunestone 
Red and Dunstone 
Killas, or Slate \ 33. 
Granite, Sienite and Gneiss..! 34. 
30. Coal Measures. 
Mountain Limestone. 
Red Rhab and Dunstone. 
Killas. 
Granite, Sienite and Gneiss. 
* Memoirs, p. 79. 
K 
