Mr. Genet’s Reply to Dr. Jones. - B19 
were those of a novice, at the call of a master who is going 
to expose his errors and correct bis blunders, or of a criminal, 
ordered to the bar for conviction. But once more I was dis- 
appointed ; the Doctor, without assigning a single reason for 
his judgment, but his infallibility, passes sentence on this ma- 
chine, warns, as a faithful sentinel, (of steam-boats,) all the 
mechanicians against its delusions, and affirms that ‘‘ it will 
“lop pe pee it is navigated.” 
decree is severe ; it contains, how ever, a valaable ad- 
mission, that I will improve, as well as a jocose comparisen, 
made by the Doctor, of my hydrostats, ‘‘to a couple of egg- 
shells suspended to a scale-beam, against which passing two 
tumblers of water, ‘hs beam will be made to vibrate.” The 
word stop implies a first movement impeded, and a vibration 
implies 
o 
Bas og vibrate on its dg ere if a force had not acted upon 
it. | accept, secoringlys the case, as the lawyers say, with 
these two admissions, as settled by the court below ; and al- 
though the Basi to egg-shells is rather derogatory, Lwill try 
to fasten to that slender link, a chain of facts and arguments 
that will lead less conceited appellate judges to consider m 
chanical combinations, and the nearer my system is brought 
to that golden rule, the more it will be exempt from the ex- 
treme intricacy of the steam-boat engines, in which such a 
Joss of power is suffered oop by friction, by decrement i in the fall 
of the piston, | ance of the air c essed, and by 
causes, that in real si ® available force ae to) 
paddle-wheels, loes not — to more than one-fourth of 
the power originally cre 
will then observe in Be SLESD es the above sae 
simile, 
i. That if the two tumblers of w. , and 
put in contact with, the pretended egg ce eee tae a call hy- 
drostats, make the beam vibrate, it is due to the pressure of 
the water, which agreeably to the property of that fluid is’ 
either upward, sidewise, or downward. 
2.. That in lieu of the tumblers, and of the hands that raise 
them against the shells, in the simile, we substitute, m 
ly, abasin of water, in ‘which shall he placed, under 
