16 APPARATUS FOR RAISING WATER, 



fln&ures as bore any relation to myfelf, I believe, withost 

 acrimony : but I have a deeply rooted averfion to every thing 

 that wears the garb of controverfy, and ardently hope the 

 difcuilion on my part will be permitted to terminate here. 

 I am, Sir, 



Your's, with much refpecl, 



OLINTHUS GREGORY. 



Royal Mil. Academy, 

 JVoolwich, Aug. 9, 1305. 



IV. 



Deftr^ 'jon and FJjecls of an Apparatus for r,aifin>* Water h$ 

 At earn of Air condcnftd in its Defccnt through an inverted 

 Syphon. By Mr. William Close. From the Inventor. 



To Mr. NICHOLSON. 



SIR, Dalton, July 27, 1S05. 



•Reference to the IN one of my letters, fome time ago, I briefly noticed an 

 en'ine * * p experiment I had made, to determine the practical value of 

 the hydraulic machine, or inverted fyphon, reprefented and 

 defcribed in the firft volume of the prefent feries of your Jour- 

 nal *, obferving, that, at fome future period, I might pro- 

 bably tranfmit to you a more particular account. Having 

 fince repeated the experiment, I now fend you a letter upon 

 the (ubject, for I am of opinion that a machine operating upon 

 the principle, when conliruded in the manner herein de- 

 fcribed, will anfwer very well, in certain fituations, to raife 

 water for domeftic purpofes ; and although it may not be com- 

 petent to perform half as much work as a bucket engine by a 

 forcing pump, yet it may be kept continually employed, and 

 be fubject to very little wear, as its operation will almoit be 

 performed without friflion. 

 Dffcrlption of The inverted fyphon when applied to raife water in the 

 another appara- manner defcribed j n this letter, has its higher orifice placed in 

 a tituation to receive both air and water at the fame time* 

 The air being conveyed by the velocity of the aqueous column 



• See Philof. Journal, Vol.' I. p. 30, PI. IV, 



to 



