_ 460 Artificial Flight: An Aérial Ship. [October, 
pressure, from the primary balloon, can be filled with air. 
As the gas expands in the larger balloon it would be forced 
out of the pendant tubes, were it not that a valve, opening 
at a low pressure, is attached to the ballonnet. The 
FIG. I. 
a 
5 b 
SC ANNIN 
\ AY 
r ) WINN NM GOROUAN ies 
Wh 
BY 
Se 
oe ae et 
Fics.1,2,3. A,the balloon; B,the car, with p, the net-work; aa, taffetas 
covering; 0 0}, collar attaching the upper netting to the covering 
of balloon; d d, silken ropes suspending the car; é e, balance ropes 
for the car; f, small internal balloon; g g, line of intersection 
of the surface of the balloon with that of small internal balloon; 
E, gaff-sail, or rudder; H, pendant tubes, the length of which regu- 
late height of the column of hydrogen; J, the cords regulating the 
valves 8; T, tube for filling small balloon with air; m, crank for 
working the screw, Q; /, stays, strengthening the screw. 
ultimate proportions of the aérostat, as given by M. Dupuy 
de Léme, are— 
Height from top of balloon to keel of car = 29°12 metres 
1 
(952 feet). 
Distance between screw shaft and major axis of balloon 
= 20°45 metres (67°1 feet). 
Distance of major axis from centre of gravity of complete 
machine (without ballast) = 15°54 metres (51 feet). 
The rudder is a triangular sail of 15 square metres 
(1613 square feet) area, manipulated by cords from the 
Car. 
