Genet’s Memorial. 341 
at the bottom of the pit, to a groove on the rim of the large 
wheel, and embrace its circumference. The large wheel is 
supplied with hand spokes, to accelerate or retard its motion, 
or it is used separately, and also with a pall, to prevent the 
load from descending, whenever requisite. The lirée wheel 
is to be 30 feet in diameter, and 90 in circumference ; which 
proportion will give 15 revolutions of the drum, while the 
large wheel will perform onl 
The cupola therefore is intended to cover an erostat, 
and allow it a definite ascension. The rest of the building 
is to cover the dry dock basins, and a large a wheel, 
H, connected to an horizontal axle or drum, I, to which are 
fasteried two ropes or chains, J, in order to oil inversely, 
pescings through the stout sheeve, K, under the drum. In 
ach of the basins will be a car or cradle, L, eas thy 
six pairs of tack screws, M, morticed in an under 
ing upon wrought-iron axies, around which cast iron "vail 
wheels will revolve, 
For the — of this zerostatic elevator, and the regula- 
tion of its power, which is also applied to lowering the boats 
to a water k el, to raise or lower carriages or rail-ways, and 
d or unded on 
- also to relieve steam-boats strande 
é 
bars, or alluvions, the upward lifts of an zerostat filled in- 
stantly by the coal gas, &c. we must refer the reader to the 
y 
- general work itself. (See plate No. 1 
Experiments on sonst power, and Grae to a 
_purpos fal 
n prop 
ssure, and must increase the repu 
Sevan Felco of caid vessel ; in consequence of whi 
damental law of nature, the author having experimented 
with an hydro@rostatometer, of known dimensions and weight, 
has been able to regulate and produce the following 
