29 1 
Evaporation in Vacuo . 
same purposes : a brief account of their memoir from 
Cuvier’s report of the discoveries of the year 1811, 1 pub- 
lished in the Port Folio, for September 1812. 
The following paper presents us with a new and in- 
genious method of producing similar effects, by mean’s 
more adapted to common use. I have translated it for 
this work. T. C. 
From the Journal de Physique , of October 1812. 
Notice of the effects of evaporation in vacuo, and on 
the means of producing a vacuum without employing an 
air pump, by M. Honore Flaugergues. 
The academy of sciences, belles lettres and arts at 
Lyons, proposed in 1811 as the subject of a prize “ The 
developement of the theory of the congelation of water, 
fey the vacuum of an air pump, and of the phenomena ac- 
companying this experiment : and also to determine its 
application to economical uses ; whether for the purpose 
of obtaining ice at all seasons and in all places, or of de- 
siccating viands, and milk, and inspissating the juices of 
fruits.” 
One of the silver medals was decreed by the society to 
M. Configliachi, professor of Philosophy at Pavia, for a 
memoir presented by that gentleman, which contained a 
luminous theory and beautiful experiments. It is suffi- 
cient to mention here, that the learned Professor had con- 
trived by means of an excellent air pump to make a va- 
cuum so perfect, that the simple congelation of water 
therein, produced a degree of cold nearly approaching to 
that, which with the assistance of mercury had equalled the 
degree of congelation of mercury ; and at length by em- 
ploy! ng ether instead of water, the mercury became solid 
in the midst of summer, and the degree of cold reached 
tb 41 below Zero of Reaumur’s Thermometer. 
The society also did me the honour of presenting me 
