PROPERTIES OF WATER AND SOURCES OF SUPPLY. 23 



must be provided for as will be shown. Spring 

 water will have to be led to a storage reservoir and 

 filtered if necessary. It may have to be raised to 

 the point of consumption, in which case the potable 

 water will have to be stored unless the spring is very 

 near the house. 



The remarks on water bearing strata refer to 

 wells which are proposed to be sunk in districts 

 overlying such. The remarks are brief as they 

 refer to geology, a branch of science in itself of 

 which the engineer certainly profits by a know- 

 ledge. 



No attempt has been made to point out where and 

 where not to sink a well, because each case must be 

 considered on its merits, and no hard or fast rules 

 can be laid down. The remarks given are only in- 

 tended to give a guide as to what the prospective 

 well seeker may expect when he has studied the 

 geological map of the district. When doubt exists 

 as to whether sinking will yield water, or when great 

 depths may have to be sunk, the services of a water 

 diviner are very useful. Water divining is a gift; 

 only very few practice this art and some of those are 

 not reliable. On the whole, however, much reliance 

 can be placed on a first-class man. 



To decide on the proper place to sink a well is not 

 an easy matter, and naturally this position must be 

 correctly determined before any work is commenced 

 owing to the expense of such work. We cannot 

 hope to place before the reader all the minor con- 

 siderations which have to be gone into, and the 

 services of a water expert are usually requisitioned 

 before any actual engineering work is put in hand, 



