IjS JTEW ENGINE. 



be inltnersed in ivater, «o that only the opper part of its 

 spiniJ remains in the air, it ought, whin turned in the con- 

 ithirh convey s^trary direction, to cailse to descend to the h^ttori of thi» 

 tom'^of^w^ser- Water tht air thtit it takefe ititoii(»» wppef piVt in every turn, 

 ^ou of water. This is precisely what Mr. Oaguiird's raachiae does. The 

 air he wants is first conveyed to the bottom of the reservoir 

 of cold water, in which the screw is immersed ; and thence 

 X it is convrjed by a pipe to the bottom of the vessel of hot 



^ water. The heat of this water immediately dilates it, and 



thus creates the new power, which is to act as the first 

 m6*er. In this way the first object of the machine is ac- 

 complished, 

 ▼hence it rises The second, as we Tiave said, is to apply this new mover 

 ^'buckl^s of" ^^ ^^^ *^^^^^ ^° ^^ produced* For this purpose the author 

 a bucket employs a bucket wheel completely imiiiersed ij^ the vessel 



wheel in hot ^f ^^^ water. The air, diliited and collected at the bottoni 

 Water, • , • 



of the vessel, finds a passage contrived so as to guide it 



under thofee buckets, which have their mouths downward. 

 The ascensional force drives the water out of these buckets, 

 and the side of the wheel ort which they are being thus ren- 

 dered lighter, the wheel turns continually like ^ common 

 bucket wheel, 

 iheinotionof This wlieel, beirig set in motion, is capable of traiisrtiit- 

 •which is ap- tincr its action td any other movable machinery,* either by a 



plied to the , , , , i • • i t i*/r 



purpose want- toothed wheel and pinion, or any other means. In iYlr. 



«^« Cagniatd^B macljine the ^ffet!i prd^uced Consists in raising, 



by means of a dotd fixed to the a:ns of the wheel, a weight 

 The effect of of fifteen pounds, with a uniform velocity of an inch in a 

 thfefiVst inoTter g^cblid, while the moving power applied to the fcrew is only 

 qrintupied. equal to three pounds with the same vel6city. The effect 

 of the heat therefore is to quintuple the natural effectofthe 

 ^^ ^ moving p'ovver. 



Pa^of this ef. It may be conceived, that, the moving power being quin- 

 fect taken to tupled, we may take from this t^ffect a sufficient moraen- 

 p"ar^of the *"°™ ^^ supply the oViginal po'wer, and still there will remain 

 power that ij^t our disposal four times the original power. This in fact 

 is ddf\k in Mi-. CagniarcTs machine. By means of a crank, 

 he Forms o comriiiiiiication between the axis' of the v(heel ■ 

 and that of the screw, so that this turns as if it were moved * 

 by an external agent, a'M consumes' by its molioa a fifth of I 

 /a *. ^^^^ 



first sets it in 

 motion. 



