Notice of the Wonders of Geology. 5 
telligible by itself, and all are united in a consistent hesmtony: and 
uty. 
"The numerous illustrations of the Wonders of Gookan are well 
selected and beautifully executed. Finer wood cuts cannot be 
found, in any work of science; they are, of course, inserted in the 
text, and thus the figures and descriptions accompany each other. 
In studying the organic remains in this work, the student, al- 
though without a cabinet, gains great assistance from such excel- 
lent figures. Bones and skeletons, and fragments of birds, quad- 
rupeds, and fishes; shells in all their endless variety ; corals and 
coralline rocks; the crinoidea or lily-shaped animals, and all 
the rich variety of zoophytes, or animal structures, in form, re- 
sembling plants; the vegetable remains, especially the leaves 
and stems, exuberant in the coral formation, beyond the con- 
ception and belief of one who is not a geologist; all these are 
fully illustrated in Dr. Mantell’s work, and all necessary sections 
are appended, shewing the relations of strata, their dislocations, 
elevations, depressions, inflexions, and lacerations, by intrusive 
masses. It was evidently an important point, in Dr. Mantell’s 
view; to preserve a manageable form in his volumes by avoiding 
folded plates, an object certainly very important, and in this work 
happily attained ; but aside from this reason of convenience, we 
should have eave: for sections on a larger scale, especially in 
the general view of the relations of the groups and families of 
rocks, giving the strata in more detail, and in more contrasted 
distinctness. 
The order of the subordinate parts of the Wonders of Geology 
is very good. The physical relation of the earth to the solar and 
the great causes that are operating to produce geological changes, 
are indicated, and the consistency of the whole with divine. rey- 
elation is successfully maintained. 
It was natural for the author to write with fullness upon the 
tertiary and secondary formations, since England is so opulent in 
interesting facts relating to these departments, and Dr. Mantell 
himself has happily illustrated the tertiary and upper secondary 
by his own beautiful discoveries, some of an unique and very 
remarkable. 
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