Locomotion with the Vapor of Chloroform. 409 
The ether vapor is treated like the steam: it passes into tubes like 
those of the vaporizer, where it is condensed by a continued jet of cold 
water is restored to the boiler, to recommence the circuit just de- 
scribed. 
Such isa brief description of the system of combined vapors adopted 
by Du Trembley. It may serve to explain the principle of his machine, 
and to show that compared with the ordinary steam engine, there will 
be a notable diminution in the fuel required. 
In the course of the trials, the commission made four experiments on 
the quantity of coal expended. Together, these trials continued through 
by the engine alone, or by this with sails, the force of the engine was 
nearly constant at about 70 horses. ‘The quantity ef coal consumed 
during the 365 50™ was 2860-9 kil., or 77:67 k. per hour, and 1-11 k. 
nent nos propre experience.” 
as such reasons have not prevailed against this mode of illumination, 
they cannot prevail against an invention which has ther advantage o 
the i 
machine is heated up before starting, it disappears entirely after the 
ship is in motion.” 
Locomotion with the Vapor of Chloroform.—Chloroform has been 
used in place of ether in an engine somewhat similar to thatof Du Trem- 
bley’s. The experiments have been made in the Orient, on a steam 
vessel of 120 horse power, called the Galilee. They profited by the 
presence of the minister of marine, to run the vesse é 
in all directions. ‘The details of the construction of the machine have 
not yet been made known. But after the above description of the ether 
engine, we may conceive that it is nearly the same thing. — y speak 
of an economy of fuel of 50 p. c. with the chloroform engine. 
Szconp Seates, Vol. XVI, No, 48.—Noy., 1853. 52 
