Mrtginefor raifing Water, g^g 



doubled or trebled, by proportionably encreafing the defcending mafs, and raifing fevcral 

 columns of water from different elevations at the fame time. 



To extend therefore the utility of the invention by illuftrating what has been here prc- 

 mifed is the intention of the prefent communication. 



A and B, in PI. XV. Fig. i. reprefent the reflels which contain the rifing and defcending 

 bodies of water : they are fpherical in the original drawing, (PI. VIH.) but to Icffcn the 

 lofs of fpace in defcent, they are here made flat and cylindrical. 



E the higher, and C the lower ciftern of the original figure. 



r, a veflel the fame as A, with tubes j, 3, and 6; it communicates with the veflel B, by 

 the tube i, and is intended to raife water out of the ciftern E into a higher and additional 

 ciftern G. 



2. enlarged tube of the original drawing. 



5. hole in the top of B, inftead of a tube. This hole and the tubes 2, 4, 6, 6, muft be 

 provided with valves, all which, while water is rifing muft be kept clofe by weights or 

 fprings, except the valve to tube 2, which muft be open. 



The tubes 3, 3, may alfo have valves to fupport the raifed columns. 



To make the engine operate without attendance, a veflel containing a fyphon muft be 

 fixed to the fide of the ciftern C, and fupplied with a proper quantity*. Every external 

 valve, except the loweft, muft have a lever joined to it ; and while clofing their refpeftive 

 tubes, they ftiould be connefted together, and to the lever of the valve to pipe 4, which 

 muft fufpend another empty vefl~el and fyphon. 



The valve of pipe 2, muft alfo be fufpended by a chain or wire from the underfide of 

 valve to pipe to 4, and when one clofes the other muft open. 



Fill now the cifterns C and E with water, and let the lower be conftantly fupplied: the 

 vefl'el on the outfide will foon become full, and the fyphon will empty the water into the 

 lower veflel, which, by Its weight will open the valves of the tubes 4, 5, 6, 6, and clofe the 

 valve of tube 2 : the vefl"el B, being filled through the hole 4 ; the defcent of water through 

 the higher fyphon having ended ; and the lower veflel alfo being nearly emptied by its 

 fyphon ; the valves will clofe the tubes 4, 5, 6, 6, and the valve of tube 2 will open; the 

 water will then begin to defcend out of B, and raife one body of water out of C into A, and 

 another out of E Into F. When B is nearly empty, or A and F are full, water will again 

 defcend through the fyphon of the higher veflTel into thejower, which will open the tubes 

 4, 5, 6, 6, and clofe 2 : B will fill a fecond time, and the veflels A and F will empty them- 

 felves into their refpeftive cifterns E and G. And thus the reciprocations continue without 

 interruption. 



Another body of water may be raifed out of G into a higher ciftern by additional appa- 

 ratus, and by proportionally encreafing the dimenfions of B and the tube 2. 



* The author evidently means to refer to the papers of Mr. Bofweli and Mr. Clofe, at pages j 17 and 293 

 of our prefent volume. N, 



The 



