416 Reviews—Frost and Fire. 
too lively) and readable style; and ‘Frost and Fire’ is illustrated 
with woodcuts of every description, scientific, topographical, and 
humorous, with maps; one of which, and one of the woodcuts, are 
also to be found in the second work. ‘This ‘American Tramp’ may 
also be recommended as an amusing account of a hasty tour in the 
Southern States of the Union, and exhibits some otherwhere unre- 
corded scenes of that country during the fourth year of their great 
Civil War. There are too many extracts from journals of travel, 
in Iceland, Norway, the Alps, &c. &c., in ‘Frost and Fire.’ The 
facts which Mr. Campbeli has accumulated and illustrated cannot 
fail to be of the greatest value to geologists, as they so widely 
extend the substantial basis on which all geological theory must be 
founded, and afford the means of confirming or correcting hypo- 
theses regarding the most universally interesting phenomena, which 
relate, to those who understand them rightly, the history of the way 
in which the surface of our earth was brought into its existing con- 
figuration. They who have leisure and means at command may 
also be induced by these works to engage, as the author has done, 
as a ‘volunteer’ in the cause of what Sir John Herschel has called 
the grandest of all sciences except Astronomy, and make their 
periodical tours more exciting and more fruitful than the mere 
going where others have been, and seeing what others have seen, 
and ‘doing’ what others have ‘done,’ can ever prove. Perhaps, 
with this view, we might regret that instead of the two large 
volumes of ‘Frost and Fire,’ we had not before us a single volume 
with less of hypothesis, a clearer arrangement, and amore condensed 
statement of the facts treated of, which might have become a 
Manual of this branch of scientific enquiry, and a work of perma- 
nent interest. But it requires experience in authorship, or a certain 
natural talent, to produce a book of this kind ; and as it cannot be 
doubted that Mr. Campbell has done what he has accomplished 
well, and has gained the ear of the scientific world, we venture to 
hope that his next literary enterprise will be of the sort we have 
described. Our space does not allow us to discuss the hypothetical 
portion of ‘ Frost and Fire,’ nor is it, where it is novel, of so much 
value, as the earnest inculcation of the habit of accurate observation 
of facts, and of reasoning from the known to the unknown, in the 
investigation of causes, by which the book is characterized. But we 
must allow Mr. Campbell to tell us what his object has been; and 
if he has (as we think) succeeded in attaiming a far more generally 
serviceable one, and instead of establishing a hypothesis, has pro- 
duced a book such as we have described above, he has no great 
cause to lament his failure. The Preface to ‘Frost and Fire’ thus 
opens :— 
‘The title-page of the first volume is a key to the contents. The 
book treats of forms, and it is illustrated from sketches made abroad 
and at home by the traveller who wrote the book. It treats of 
forms and of engines, and of forces which drive engines; of sculpture 
and of chips which are tool-marks of natural engines. On the title- 
page, the word “Frost” is written over snow, and above the top of 
