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POPULAR SCIENCE REVIEW. 
features of the country, in the third he presents us with a short summary of 
the Geology of Siberia, for which, however, he states that he is indebted to 
Mr. W. W. Waddington, of Brazenose College. To this succeeds a chapter 
on Mineralogy, which might with advantage have been extended to greater 
length, considering the vast mineral resources of the country, but as these 
resources are far from being developed, it would perhaps be hardly fair to 
complain of the author’s brevity in tills instance. We may, however, 
remind the author, that malachite (p. 55) is carbonate and not oxide of 
copper. The chapter on the Fauna of Siberia is of particular interest, the 
account of the discovery of remains of the mammoth especially being com- 
piled with no little skill. Curiously enough, the fur-bearing character of 
Siberia is scarcely mentioned, and the sable does not even make its appearance 
in the list of Siberian mammals. Of the Flora we hear very little. Per- 
haps there is little to tell, except that ‘ enough wheat could easily be raised 
to supply the entire European market,’ a fact which may be thought worthy 
of notice at the present time. Only two pages are devoted to climate, of the 
rigour of which we gain some idea from the fact that at Yakutsk, ‘ the coldest 
city in the world,’ the mercury 1 remains congealed for two, and sometimes 
three months in the year.’ Concerning the native races and ‘ folk-lore,’ we 
have upwards of a hundred pages. This part of the book is perhaps the 
most interesting in the volume, and though but a compilation from the 
writings of other authors, contains many facts which must prove new to the 
general reader. The volume concludes with an account of recent explora- 
tions down to the time of Professor Nordenskiold’s latest expedition, and is 
illustrated with a map Of Siberia, very nicely executed, by Stanford. The 
book is in every particular a very pleasant and readable one, and deserves to 
meet with favour at the hands of the public. 
METALLIFEROUS MINERALS AND MINING* 
T HE author states in his preface that it has been his design to describe in 
a concise and systematic manner the conditions under which metals 
and metalliferous ores occur in various parts of the world. He also expresses 
a hope that such descriptions may serve, in the first place, to explain, to 
some extent, the origin of ore deposits, and, secondly, by defining the 
zones occupied by the ores of the different metals, to lessen the amount 
of risk with which metalliferous mining is invariably attended. He further 
hopes that the figures and other data which he furnishes may have the 
effect of more clearly defining the conditions resulting in successful mining 
enterprise. 
The volume, which extends over nearly 450 octavo pages, is illustrated 
with numerous woodcuts, for the drawings for which the author expresses 
his obligations to his son; and although among these we recognize some 
* A Treatise on Metalliferous Minerals and Mining. By D. 0. 
Davies, F.G.S., Mining Engineer, Examiner of Mines and Collieries, Member 
of the Geologists’ Association of London, Honorary Member of the Natural 
Science Society of Chester and Wrexham, &c. Author of a Treatise on Slate 
and Slate Quarrying , &c. London : Lockwood & Co., 1880. 
