Economical Lamp for obtaining high temperatures. 391 
and spirit of invention. T'wenty-five among these latter have 
received bronze medals as well as books. All were distinguished 
for having made some improvements in the processes of their 
manufactures. Medals of bronze, of gold, or of platinum have 
warded to inventors, whose inventions have been success- 
fully carried out. Some among these are already known to our 
readers; they are,—M. Dubrunfaut, for his economical produc- 
tion of alcohol from the juice of the beet ;* MM. Girard and Au- 
bert, for the impulse they have given to the caoutchouc indus- 
try ;+ M. Mirand,t for the successful application of the Electrical 
Telegraph to the wants or convenience of private life. We pro- 
pose to describe another time his apparatus, which is already in 
equally well. 
In the lamp, the burning fluid used is bronght to the state of 
Vapor and inflamed before a blowpipe with a large aperture, the 
air of which is furnished by the bellows of an enameller’s lamp. 
ut a few seconds are required to raise a platinum crucible to the 
* This Journal, Sept. No., p. 274. —_{ Ibid, p. 277. t Ibid, Jan., 1853. 
