104 
WILLIAM SMITH I HIS MAPS AND MEMOIRS 
map, in 1831, Avas in the possession of John Phillips, the Curator of 
the Yoik Museum.* It appears to be lost now. 
SMITH, 1801. 
" General Map of the Strata found in England and Wales, by \Vm. 
Smith, Surveyor, 1801." 
The geological features are coloured on a copy of Gary's index to 
the Map of England, which measures 11 inches by 9 inches. On the side 
of the map is written, ''Wm. Smith, Midford, near Bath," and on the 
bottom, "Presented to the Geological Society by Wm. Smith, February 
21, 1831," all the inscriptions being in Smith's own writing. 
The colours adopted . . . appear to have been very similar 
to those used in Smith's later engraved maps. There is nothing in the 
way of an index of colours attached to this first geological map of 
England and Wales, but, by reference to the author's later publications, 
it is not difficult to determine what the several bands of colour are 
intended to indicate. The formation of which the outcrops are repre- 
sented range from the chalk to the Old Red Sandstone, the colours 
employed being eight in number, though a number of other signs, 
indicating collieries, mines, and slate quarries, adds much to the 
valuable information supplied by this remarkable map. The strata 
represented are, in descending order, as follows : — 
1. Chalk (green). 
2. " Sand of Portland Rock " with which is confounded (as in 
later maps) the Carstone of Norfolk {purple). 
3. Oxford Clay (" Clunch Clay " of Smith) (greij). 
4. Oolite. The Outcrop represented is that of the Great Oolite 
of the Bath area, and of the Inferior Oolite both south 
and north of that area {yellow). 
5. Lias {dull blue). 
6. Trias and Permian (" Red Marl " of Smith) {light red). 
7. Carboniferous Limestone, with which is confounded the Mag- 
nesian Limestone (bright blue). 
* See Prof. Sedgwick's Address, Proc, Geol. Soc, Vol. I., 1834, 
p. 273. 
