88 WATER. 



CHAPTER IV. 



WATER SUPPLY. 



An abundant supply of good water is essential 

 to the successful cultivation of any plant and the 

 violet is no exception to this rule. Water is 

 needed not only to keep the ground moist, but to 

 syringe or spray in order to keep down red spider. 

 For ordinary watering no force is required, but 

 for spraying, arrangements must be made to get 

 a pressure of not less than twenty pounds to the 

 square inch in the system of pipes. Where city 

 water is to be obtained and the rates are reason- 

 able, the simplest plan is of course to merely get 

 proper connections with the mains. Where this 

 is not practicable, however, the water must be 

 obtained either from wells or from some other 

 source, and must be stored in a tank or some suit- 

 able reservoir to be drawn upon when wanted. 

 For two to three thousand plants a tank of one 

 thousand gallons capacity will be sufficient, and 

 for every two thousand additional plants a thou- 

 sand gallons more of reservoir space will be 

 required. Thus for ten thousand plants a tank 

 holding not less than five thousand gallons should 

 be at hand. These statements apply mainly where 



