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, Deposition 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 8vo. 10s. 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.
THE BODY AT WORK.
By ALEX HILL, M.A., M.D., F.R.C.S.,
Sometime Master of Downing College, Cambridge.
Author of 'An Introduction to Science,' 'The Physiologist's Note-book,' etc.
With Illustrations, xii + 452 pages, Demy 8vo. 16s. net.
This is a book for the non-professional reader, not a regular text-book for the medical student. It does not assume any technical knowledge of the sciences, such as chemistry, physics and biology, which lead up to a formal study of physiology. Dr. Hill describes the phenomena of life, their interdependence and causes, in language intelligible to people of general education, and his book may be compared in this respect with Dr. Hutchison's well-known work on 'Food.' There is perhaps a prejudice against the ordinary popularizer of scientific knowledge, but when a master of his subject takes up his pen to write for the public, we cannot but be grateful that he has cast aside the trammels of the text-book, and handled subjects of vital interest to humanity in so broad and philosophic a manner.