Mr. Edward Arnold's List of New Books 15 



THE DRESSING OF MINERALS. 



By HENRY LOUIS, M.A., 



PROFESSOR OF MINING AND LECTURER ON SURVEYING, ARMSTRONG COLLEGE, 

 N EWC ASTLE-ON-TVNE. 



With about 400 Illustrations. Royal Svo. 305. 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 Svo. 75. 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 Svo. IDS. 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. 



