348 THTAS J OOTANAL, OP VGHOLOGNY- 
hypothesis that the strata were ore-bearing at the time of their forma- 
tion, and that the metals were derived from sea water. 
This paper is well worthy of study by American geologists. Whether 
the explanations are applicable to any of the similar ore deposits of 
this country or not, the discussions are full of suggestion, and are 
instructive examples of conservative reasoning. 
ARTHUR WINSLOW. 
St. Louis, March 13, 1895. 
Fragments of Earth Lore. © By. \AMES \GEIKIE, DCL), ID 
ERS. ee. 428 pp, © plates. John Bartholomew & Coy 
Edinburgh. 
This volume contains a series of essays and addresses, most of 
which have been published elsewhere. Many of them have appeared 
in the Scottish Geological Magazine, while some have appeared in 
other publications which are less accessible to American readers. The 
scope of the volume is indicated by the following titles which serve as 
the headings of as many chapters: Geology and Geography; The 
Physical Features of Scotland; Mountains, their Origin, Growth, and 
Decay; The Cheviot Hills; The Long Island, or outer Hebrides; 
The Ice Age in Europe and North America; The Intercrossing of 
Erratics in Glacial Deposits; Recent Researches in the Glacial Geol- 
ogy of the Continent; Glacial Period and the Earth-movement 
Hypothesis; The Glacial Succession in Europe; The Geographical 
Evolution of Europe; The Evolution of Climate; The Scientific 
Results of Dr. Nansen’s Expedition ; The Geographical Development 
of Coast Lines. 
As will be seen by the titles, the several chapters have no intimate 
relation to each other, though most of them deal with geographic 
phases of geology. Each chapter is complete in itself. While some 
of the essays deal with phenomena which are local, all of them deal 
with principles which are more or less general in their nature, and 
many of them deal with phenomena which are of universal interest. | 
The subjects are treated in a way which is popular without being 
unscientific. A service is rendered to students and teachers of geol- 
ogy in collecting and presenting the essays in a single volume, which 
should find a place in every geological and geographical library. The 
untechnical language of the essays will make the book available for 
