V! PREFACE. 



book treats that it would be equally impossible to 

 treat them all exhaustively. For instance, the im- 

 portant subject of hydraulics is a very wide one, and 

 is freely discussed in separate books. The object of 

 the writer, however, has been to go into each sub- 

 ject as far as it will under any ordinary circum- 

 stances concern the designer of small waterworks, 

 so that the book, although it is hoped that the 

 engineering profession will find it welcome, will 

 permit of those whose experience in engineer's 

 work is somewhat limited being able to form a good 

 idea of how such work may be successfully done. 

 Again, the chapter on storage treats of different 

 kinds of dams and walls, and points out how each 

 different variety may be economically designed, but 

 no attempt is made to show WHY such constructions 

 are used, because this subject would belong to books 

 on engineering, design, and mechanics. The method 

 of applying each theory is, however, fully explained 

 to the best of the writer's ability in a practical 

 manner, so that although the knowledge of the 

 " why and wherefore " which should be in the pos- 

 session of a fully qualified engineer is an advantage, 

 yet those who have not this knowledge may with 

 reasonable forethought follow the text. 



Regarding the question of pumps, pump design 

 belongs to the mechanical engineer, and although 

 the purchaser rarely designs his pump, yet the 

 chapter on this subject aims at pointing out the 

 different circumstances under which pumping will 

 be required, and advising the reader what class of 

 engine is the best in every way for the particular pur- 

 pose and then to describe briefly that engine. Of 



