The object of this book is to describe the principles and practice adopted in the Engineering of Open Streams. If the book seems to be somewhat small for its object, it will, it is hoped, be found that this is due to care in the arrangement and wording.

Sources of information have been acknowledged in the text, but special mention may be made of lectures given by Professor Unwin at Coopers Hill College, of Harcourt’s large work on Rivers and Canals, of the papers1 by Binnie on rainfall, by Shaw on the closing of the river Tista, by Harcourt on movable weirs and on estuaries, by Strange on reservoirs, and by Ottley and Brightmore, Gore and Wilson, and Hill on the stresses in masonry dams; of the articles by Bligh2 on weirs with porous foundations and by Deacon3 on reservoir capacity, of the Indian Government paper by Spring on “River Control on the Guide Bank System,” and of the Punjab Government paper containing Kennedy’s remarks on silting and scour in the Sirhind Canal. The two papers last mentioned are not easily accessible, and they contain matter of great interest. The important points, often obscured by masses of detail or figures, have been extracted.4

Silting and scour (Chap. IV.) had already been dealt with in Hydraulics,5 but some further information has since come to light and the subject has been treated afresh and the matter re-written.

E. S. B.

Cheltenham, 1st May 1913.