142 
WILLIAM SMITH : HIS MAPS AND MEMOIRS 
" This very important work illustrates in a remarkable manner the 
clearness of Smith's views regarding both the underground structure of 
the country and the relation of the forms of the surface produced by 
denudation to that structure." It measures 53^ inches by 12 inches, 
which is larger than the five following sections. It is headed 
" Geological Section from London to Snowdon, / showing the Varieties 
of the Strata, and the correct altitudes of the Hills. / By William 
Smith, Civil Engineer / 1817. / Coloured to correspond with his / 
Geological Map of England and Wales. / The numbers refer to the 
geological table by the same author.* / Various heights of hills, etc., 
are given by means of a ' scale of feet.' " On each side of the 
section these range from " Snowdon 3571 " down to sea level. On 
the left margin of the chart is written : — 
" T HIS SECTION shows correctly the relative altitudes and 
general Features of the Country along the Road through the Places 
marked on it forming an Epitome of BRITISH GEOLOGY, 
naturally and distinctly divided' into seven Classes, four principal 
Ranges of High Ground and three of loiv 
" The hills thus appear to he chiefly composed of rocky and 
hard Strata & the V allies of lax and soft 
" The Elevations above the Level of the Sea are obtained from 
the Trigonometrical Survey 
'* Several distant E^ninences are shewn in the respective Ranges 
of Hills 
" The Contour is unavoidably distorted from the Necessity of 
representing the Distances and Altitudes by different Scales 
** Some Strata in the Series which are obscure upon this Road 
are very distinct upon others 
** Further elucidation of the Strata discovered and traced by 
W. Smith are given in his other Works 
" Geological Map of England Wales — 15 Sheets accompanied 
with a descriptive Memoir £5 55. Od. 
" Strata identified by organized Fossils in 7 numbers Is. 6d. 
each 
** Stratigraphical System of Organized Fossils 
Geological Table kc, &c." 
* From this it is apparent that the ' Geological Table of British 
Organised Fossils ' just described, was published first. 
