APPARATUS fOR RAISING WATER. 0.5 



The fupply of condenfed air will now continue lo force Defcription of 



water out of the chamber H, and to deprefs the fluid in the the whin** 

 a-. • 11 i ti , -ii conftrutted for 



pipe C, in an equal degree, until all the water in the eham- ra if in g water, 

 ber is expelled. The water will then fink in the higheft part Hy air condenfei 

 Of the pipe K, and the acting and re-acting columns propor- f V phon. 

 tionally lengthening, air will collect in the veflel B; the float 

 and re-curved fyphon will defcend ; and before the deprefiion 

 of water in the pipe K reaches the lower end of the pipe L ; 

 before the condenfed air can efcape by expelling the water 

 contained in this pipe, the elevated bucket M will fall in con- 

 fequence of water poured into it by the fyphon, and the com- 

 munication between C and E bei^g opened, the condenfed 

 air will rufh out of H, through the open pipe G, whofe out- 

 let is at O m the cock C E G O, Fig. 3 ; the valve in L will 

 fupport the water above it, and the force of the acting column 

 being again thrown upon the water in the chamber F, the 

 fluid will begin to afcend into K; the re-curved fyphon will 

 rife and continue in its place as before, until the water begins 

 to fill that part of the pipe G which rifes from the top of the 

 chamber H, or, if there cannot be a furficient quantity raifed 

 from the lower chamber to fill the higher, until it begins to be 

 deprefled into that part of the pipe K, connected with the 

 bottom of the chamber F; the fyphon will then be let down 

 by the float, will pour water into the bucket laft elevated, and 

 thus again open the communication between the air-holder 

 BC, and the higher chamber, from which the water will be 

 expelled ; and in this manner the alternations will proceed, 

 the machine continually raifing water from one or other of its 

 chambers. 



By additional pipes and chambers, fimilar to G H L, a 

 fmaller quantity of water may be raifed frill higher, the loweft 

 additional chamber being fixed upon the top of the pipe L, 

 and the pipe for fupplying it with condenfed air, connected 

 to the pipe E. A pipe for fupplying a chamber frill higher 

 muft be attached to the higheft part of the pipe G ; and it is 

 evident, that if E leads to two chambers and G only to one, 

 the machine will regulate its operations fo as to lofe no time. 

 It will be requifite, however, to fill the additional chambers 

 with water before the machine is let to work. 



Where the fupply of water is variable, the machine may 

 be adapted by having feveral pipes fiiml^r to A A, but fome 



• wider 



■* 



