PREFACE 



In this little volume the publishers are offering 

 to all who are interested a compact collection of 

 principles, methods, formulas, and tables pertain- 

 ing to the different branches of civil engineering. 

 It is intended as a ready reference manual for the 

 student as well as for the technical man engaged 

 in practical work. For this reason, whenever 

 there was a choice of rules or methods, only the 

 simplest and those best suited to practical use 

 were selected. For the same reason, wherever 

 possible, examples such as would occur in prac- 

 tice have been given, together with their solu- 

 tions, thus illustrating the different steps and 

 processes to be performed in order to obtain 

 practical results. 



Attention is called to the tables, which are very 

 numerous. Many of these can be found else- 

 where only in special works, and many are orig- 

 inal, being found only in this book. Of the 

 latter kind, are the Hydraulic Tables, giving the 

 discharge, velocity, and head per unit of length 

 for cast-iron pipes from 4 to 72 inches in diam- 

 eter; and the Reinforced-Concrete Tables, by 



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