Reviews and Book Notices. 
262 
Wisconsin, and hence many of the illustrations are drawn from American 
sources. The main evidences, however, upon which the book is based, 
apply to almost any country, and there is no doubt that the volume will 
appeal to British workers. 1 The structural geologist has, in recent 
years, found it necessary in his field of work to give much attention to 
the genetic relationships of rock structures produced by deformation. 
Some of these relationships have not yet found expression in the available 
literature on the subject. The student reads in general text books about 
individual structures but seldom of their relations, with the result that 
at least in his early field work he may fail to utilize methods which are 
helpful or essential in the interpretation of the geology of a district. 
Emphasis upon geological structures as related parts of a record or process 
rather than as isolated facts determine the method of presentation in this 
book.’ There are 08 illustrations from sketches and photographs, which 
considerably add to the clearness of the descriptions, those of the numerous 
•experiments being very striking. 
BOOKS ON WATER SUPPLY. 
Clean Water and How to get it. By Allen Hazen. London : Chapman 
.& Hall, 1914, pp. 196, 6s. 6d. net. This volume was evidently written 
by the author while* visiting the Brisbane Board of Waterworks. It 
is devoted to a technical account of the means adopted by the American 
cities to secure pyre water. After dealing with the various reservoirs, 
etc., it refers to stagnation, turbidity, tuberculation, coagulation, sedi- 
mentation, purification, etc. The facts and figures given and the numerous 
illustrations will doubtless provide much material of value to waterworks’ 
engineers. , 
Water : Its Purification and use in the Industries. By W. W. Christie. 
London : Constable & Co. 219 pp., 8s. 6d. net. This volume is largely 
reprinted from ‘ Industrial Engineering and Engineering Digest.’ It is 
mostly drawn from American examples, and deals with VVater Softening, 
Filter Water, Erosion, Measurement of Water, and numerous other aspects 
of this important question. It is fairly well illustrated by very careful 
drawings, and photographs, some of which are coloured, and will partial 
Iarly appeal to manufacturers and other large consumers, in the practical 
information it gives. 
Studies in Water Supply. By A. C. Houston, D.Sc. Macmillan & 
Co., London. 203 pp, 5s. net. This work is not a text-book, but rather a 
monograph dealing with the author’s own personal experiences and in- 
vestigations. As Director of the Water Examination Department of the 
Metropolitan Water Board, the author has a very high ' standing, and 
his experiences in various parts of the country make this volume of 
peculiar value. The book is not an elementary treatise nor does it pro- 
fess to be. It is packed with statistics, diagrams, and tables, which are 
specially valuable, and the author and publishers are to be congratulated 
on so much information being brought together within so small a compass. 
\mong the special subjects are the Sources of Water Supply, Abstraction, 
The Supplementary Processes of Purification, Sterilisation, Storage, 
Water and Disease, The Financial Aspect of Water Supply, Bacteriolog- 
ical Methods, etc. 
The Microscopy of Drinking Water. By G. C. Whipple. London : 
Chapman and Hall, 1914, 409 pp., 17s. net. This book is bv the Professor 
of Sanitary Engineering at Harvard University, and while it is naturally 
largely of interest to our American cousins, it contains much that is of 
value to those concerned in our water supply at Home. This book has 
a twofold purpose. It is intended primarily to serve as a guide to the 
water analyst and the water-works’ engineer, describing the methods of 
Naturalist, 
