574 PROOFS OF DESIGN 
Mineralogist has ascertained that Granite is a 
compound substance, made up of three distinct 
and dissimilar simple mineral bodies, Quartz, Fel- 
spar, and Mica, each presenting certain regular 
combinations of external form and internal struc- 
ture, with physical properties peculiar to itself. 
And Chemical Analysis has shewn that these se- 
veral bodies are made up of other bodies, all of 
which had a prior existence in some more simple 
state, before they entered on their present union 
in the mineral constituents of what are supposed 
to be the most ancient rocks accessible to human 
observation. The Crystallographer also has fur- 
ther shewn that the several ingredients of Granite, 
and of all other kinds of Crystalline Rocks are 
composed of Molecules which are invisibly mi- 
nute, and that each of these Molecules is made 
up of still smaller and more simple Molecules, 
every one of them combined in fixed and definite 
proportions, and affording at all the successive 
stages of their analysis, presumptive proof that 
they possess determinate geometrical figures. 
These combinations and figures are so far from in- 
dicating the fortuitous result of accident, that they 
are disposed according to laws the most severely 
rigid, and in proportions mathematically exact.* 
* The above Paragraphs of this Chapter excepting the first, 
are taken ahnost verbatim from the Author's MS. Notes of his 
Lectures on Mineralogy, bearing the date of June 1822, and 
he has adhered more closely to the form under which they ap- 
