104 On Mineralogical Surveys. | [Fex. 
their height above the level of the sea; rocks on which they rest ; 
the substances with which they are intermixed, and the alluvial 
matter and soil which cover them; chemical examination of the 
different marls; uses, and mode of digging and searching for. 
them. ; 
_ 4, Description of the different rocks of which the county is com- 
posed, according to their various mineralogical relations. N.B. This 
very extensive and interesting part of the Report will contain a 
variety of sections illustrating the internal structure of the ranges 
of mountains, and showing the rocks of which they are composed. 
5. Mineralogical description of the mineral veins and beds that 
occur in the county. 
Ill. Economical Part. 
1, Descriptions and chemical analysis of the different kinds of 
ores found in the county. The mode of mining in particular spots 
depending on their local situation, the expense of mining and 
quarrying, and the particular tracts pointed out where trials of 
greater or less extent may be advantageously carried on by pro- 
prietors. 
2. Descriptions of the different kinds of lime-stones and marbles ; 
quarter of the county where they occur, magnitude of the beds, 
mode of quarrying them, and proposed economical kiln for burning 
the lime-stone ; chemical analyses of the different lime-stones and 
marbles in the county, with the view of ascertaining their value in 
agriculture, building, and statuary. 
3. Descriptions of the different kinds of slate that occur in the 
county; places where the best kinds are found; mode to be fol- 
lowed in quarrying them; characters to be used for distinguishing 
good from bad slate ; and a statement of those symptoms that jndi- 
cate the presence of slate. 
4. Descriptions of the different species of precious stones that 
occur in the county; places where found, mode of searching for 
them, and of estimating their value. 
5. Descriptions of the different kinds of building stones found in 
the county; places where found ; most eligible spots for quarrying 
them ; mode to be followed in quarrying them; and the kinds of 
building for which the different sorts are best calculated. 
G. General observations on the probability of finding coal in the 
county, with a statement of the best mode of following out such 
favourable appearances as may occur. 
7. General observations on the mineral riches of the county, and 
a comparison of its mineralogical structure with that of other 
counties, 
