Construction of Fountains for Gardens. 



213 



quills, because the water, in a pipe of uniform diameter of so 

 great a length, is found to lose much of its strength, and 

 become what is technically called sleepy ; while the different 

 sizes quicken it, and redouble its force. For example, in 

 a conduit pipe of 1800 feet in length, the first 600 feet may 

 be laid with pipes of eight inches in diameter, the next 600 

 feet with pipes of six inches in diameter, and the last 600 feet 

 with pipes of four inches in diameter. In conduits not ex- 

 ceeding 900 feet, the same diameter maybe continued through- 

 out. When several jets are to play, in several, or in the 

 same fountain, it is not necessary to lay a fresh pipe from each 

 jet to the reservoir; a main of sufficient size, with branch 

 pipes to each jet, being all that is required. Where the con- 

 duit pipe enters the reservoir or cistern, it ought to be of 

 increased diameter, and the grating placed over it ought to 



p 3 



