ENGINE TO RAISE WATEA, '^9 



The ingenious gentleman who has favoured me with the Engine for em-, 

 fketch from which Plate XVI. was made, has direaed his P^°J^"S w^^c 

 invention (o teach us how the wafte water of our apartments, 

 and other fimilar places, may be made to raife other water in 

 its defcent ; and the fimple engine he propofes for that purpofe 

 confifts of the following parts : 



A, B, and C reprefent three veflels or compartments. The Defcriptlon. 

 upper compartment A is an open trough, or wafle receptacle, ^'^ ^ lyphoa 

 which can be emptied into the fecond clofe velTel B, by turn- ments. 

 ing the cock D; which cock, by the fame motion, opens the 

 communication-pipe I and an air-pipe H, to fuffer the included 

 ajr to iffue out. N and M are Lhe two legs of a fyphon ; the 

 (liorter N, communicating with the refervoir O, containing 

 water, and the longer M, communicating with a trough P, 

 at a lower level which overflows into the drain. The cock F, 

 by the fame turn, opens or (huts both thefe pipes at once. 

 And laftly, the pipe G forms a communication from the upper 

 part of the, receptacle B to the upper part of C. The procefs 

 may be Ujus explained : 



When D is opened, the m.lddle veflel B receives wafte water The foul -water 

 from A. If D be Ihen (hut and F opened, the longer fyphon- ''""^ ^°^" °"^ 

 leg M admits the waiie water to flow into P ; leaving a fpace water afcendrby 

 in B wherein the air in C as well as B expands (with a dimi- the other. 

 ni(hed fpring) by means of the pipe G. The preflure of the 

 atmofphere on the water in O will therefore raife that fluid 

 into C, provided the height be not too great ; and if the dif- 

 ference between the heights of the veflTels B and C be equal to 

 that betyveen O and P, the quantity of frefli water raifed may- 

 equal that of the waile which defcends from the greater 

 height. 



The cock E feryes to draw ofl^the water fo raifed; at which 

 time it h convenient that the cock F (hould be fliut; and this 

 fliould alfo be done whenever the cock D is opened. This 

 may eafily be made to take place by a iimple connection be- 

 tween the cocks, without depending on the (kill or diligence 

 of the fervant. 



W.N. 



Oa 



