i5 
Mr. Edward Arnold's List of New Books 
THE DRESSING OF MINERALS. 
By HENRY LOUIS, M.A., 
Professor of Mining and Lecturer on Surveying, Armstrong College, 
N ewcastle-on-Tyne. 
With about 400 Illustrations. Royal 8 vo. 30s. net. 
The object of this book is to fill a gap in technological literature 
which exists between works on Mining and works on Metallurgy. 
On the intermediate processes, by which the minerals unearthed by 
the miner are prepared for the smelter and for their use in arts and 
manufactures, no English text-book has yet appeared. The present 
work should, therefore, be very welcome to students, as well as to 
miners and metallurgists. 
THE GEOLOGY OF ORE DEPOSITS. 
By H. H. THOMAS and D. A. MacALISTER, 
of the Geological Survey. 
Illustrated. Crown 8 vo. 7s. 6d. net. 
This book belongs to a new series of works under the general 
editorship of Dr. J. E. Marr, F.R.S., for students of economic 
geology, a subject which is receiving more and more attention 
in our great educational centres. It is also hoped that the series 
will be useful to students of general geology, as well as to 
surveyors and others concerned with the practical uses of geology. 
The chapters in the present volume treat severally on the Genesis 
of Ore Deposits, Segregation, Pneumatolysis, Metasomasis, Depo¬ 
sition from Solution, Sedimentary Deposits, and Secondary Changes 
in Lodes. 
STEEL ROOF AND BRIDGE DESIGN. 
By W. HUME KERR, M.A., B.Sc., 
Lecturer on Engineering, Drawing and Design, University of Edinburgh. 
With detailed Drawings. Demy 8 vo. 10 s. 6d. net. 
In accordance with a need long felt by engineering students, this 
work presents the complete designs of four typical structures—two 
roof trusses and two bridges—worked out with full arithmetical 
calculation of stresses. There is a minimum of theory, and the 
author’s object has been to make the methods of design so clear as 
to enable students and engineers to proceed to design independently. 
