22 APPARATUS FOR RAISING WATER. 



Dcfcription of by adding weight to the other end of the lever; to make fuch 

 the machine as adjuftment, that while both are imraerfed in water, the body, 

 raifing water, within the veflel B, (hall be a few ounces lighter; and, on 

 by air condenfed the contrary, when it alone is above the water, it (hall be fo 

 fyphon. W much heavier than its counterpoife, which is covered. A fmall 



cylindrical veflel 2f inches in diameter, and the fame in depth, 

 filled with water and clofed, will probably be fize fufficient 

 for fuch a float ; and the proper counterpoife may be very rea- 

 dily and eafily found, by having the lever fixed on its axis 

 in a veflel of water, repeatedly drawing off and replacing the 

 fluid in that part of the veflel which contains the float ; and 

 increafing or diminishing the weight, until the proper adjuft- 

 ment is obtained. But to proceed with our defcription. 



S reprefents a fmall fyphon fufpended by a lever, with one 

 branch in the infide, and the other on the outfide of the ciftern 

 R. The outfide branch being re-curved in the manner repre- 

 fented in Fig. 5, it is evident, that when the inftrument is 

 filled, it will draw water out of the ciftern whenever the ori- 

 fice of the re-curved branch is deprefled below the level of, 

 the water in the ciftern ; and that its operation will be fuf- 

 pended by raifing the fame a very little above that level. 

 From the contrary end of the lever, a chain or wire defcends, 

 and is connected to the lever which carries the float; and by 

 this connection, the fyphon is fufpended with the orifice of its 

 re-curved branch above the furface of the water in the ciftern, 

 while the float occupies the highelt part of the veflel B; for 

 the weight of the fyphon and that of the included column muft 

 be fo nearly counterpoifed by the chain and an additional 

 weight, that it cannot deprefs the float, though it muft poflefs 

 fufficient weight to defcend when allowed by the defcent of 

 the float. 



M reprefents two cuneiform buckets, connected at their 

 bafes by a tranfverfe partition, and fixed upon a horizontal 

 axis, as is more clearly exhibited by the fection, Fig. 4. 

 When the bottoms of thefe are placed in an oblique direction, 

 making an angle with the horizon of 25 or 30 degrees, as re- 

 presented in the drawing, (Fig. 2.) and a fmall ftream of 

 water falls from the fyphon, the higher bucket will receive 

 the water, and falling in confequence of its load, will raife 

 the other bucket, which will now receive the water, and by 

 falling will raife the firft, whofe contents were emptied in its 



defcent. 



