Mr. Genet’s Vindication. 101 
only application, Sir, of the hydrostat, which the Boston re-_ 
viewers have suffered to pass unmolested, is the hydronaut, 
] 
Jaws of statics united in that self-mov ing boat, are the objects 
of their stale comparison to the perpetual motion.) They 
let it go without scrutiny, although I do not conceal that 
it is the only one of my applications which has raised doubts, 
in the minds of scientific mechanicians, friendly to the other 
plans. It is questioned whether the force created by the hy- 
drostats will be sufficient to operate at once on the paddles 
mechanical, while the swimming or natation of the fishes is 
the result of a static power, combined with a mechanical 
force. Deprived of the balloons or zrostats, men would nev- 
er have succeeded in supporting themselves in the air; but by 
the help of the zrostatic power, and of the means of propul- 
sion and direction which I have offered, they will be able, 
whenever they will take proper measures, to navigate the air 
with as much facility as the fishes swim in the water ; because 
to succeed in that prowd undertaking, three requisites only 
were wanted, which are all three, new, by the prexress of sci- 
ence and our natural inteilect, under our control; 1 mean 
