96 Animadversions on Mr. Genet's Memorial, SfC 



same beam. This machinery consists principally, of two 

 pumps oddly enough, called air pumps ; their piston rods 

 are attached to the beam, they being placed within the main 

 cylinders ; to the beam is also appended the apparatus for 

 opening and shutting the valves ; a piece fourteen feet in 

 height, ascends from its centre, and from the end of this, a 

 rod passes, which is to act upon a crank, and give motion 

 to paddle wheels, whilst by the intervention of a large wheel 

 turning a pinion, the velocity is to be increased. Should 

 any one wish for a model of this machine, he may make it 

 by suspending an egg shell, upon each end of a small scale 

 beam, these will be his hydrostats ; then by taking two glass- 

 es of water, and passing them alternately upwards against 

 the shells, he will cause the beam to vibrate ; and if he can 

 then only contrive to attach to the beam, something which 

 will relieve his hands from the task of moving the glasses, 

 he will have contrived a perpetual motion, exactly upon the 

 principle of that of Mr. Genet. Should he be at a loss to 

 see how this is to be done, we must refer him to the inven- 

 tor, as we cannot direct him even with the aid of the en- 

 graving, and the book. " So the hydronaut will navigate 

 until it is stopped," say the gentlemen concerned ; we how- 

 ever, feel inclined to transpose the sentence, and to say, 

 " so the hydronaut will stop until it is navigated." 



However ludicrous the machine may appear, as represen- 

 ted in the proposed model, Mr. Genet cannot deny that, so 

 far as it goes, the picture is a correct one ; and that it would 

 be completed by first allowing the tumblers to stand in 

 a vessel containing water, so that it might run on the outside 

 of them, to the same height at which it stood within, or to 

 the same height at which they would stand, were their bot- 

 toms perforated ; and then causing the beam to work two 

 pumps, and two valves, which should alternately exhaust 

 the tumblers of their water, and alternately allow- them to 

 fill ; the beam should do this perpetually, until it be forcibly 

 stopped ; it should also produce a large excess of power, 

 which, in the actual machine, is to give " power superior to 

 the effective and disposable force of any steam boat naviga- 

 ting the ocean." Mr. G. further says, that between this and 

 the steam engine " there is no difference but simplicity and 

 economy." 



I have sir, with great pleasure, read your observations on 

 aerostation, and coincide with you, in almost every instance. 



