1241 
by electric heating by means of a platinum wire in the liquid. It 
appeared, however, that in this case decomposition occurred, as was 
immediately proved by an abnormally high solution point of the 
distillate. Prof. Smits then directed our attention to the apparatus 
represented in fig. 8. To the flat bottom of a glass tube 20 em long 
and having a diameter of 2 cm a little, narrow tube A, 2 em long, 
is sealed, which is wrapped with a sheet of asbestos paper, round 
which nickelin wire is wound. By an electric current the liquid in 
this short tube is then so strongly heated, that it brings the whole 
mass very quickly to boiling. Nevertheless, when making experiments 
under lower pressures, it was desirable to throw in some little 
capillary tubes, as the substances are very highly lable to super- 
heating. The whole apparatus was packed with cottonwool in an 
asbestos mantle. It is provided with a ground stopper, from which a ther- 
mometer (Anschiitz) is hanging, and with two 
side tubes: 5, leading to a reflux condenser, 
and C, which — enveloped by nickelin wire 
and sufficiently heated during the experi- 
ment — leads the vapour to the receiver. 
This consisted of a wide glass tube cooled 
by earbondioxide and alcohol, in which one 
or two small tubes, provided with a con- 
striction, were placed, which might contain 
about 1 e.e. of liquid. When the moment of 
receiving the distillate has arrived, the wide 
tube is turned in such a way that one of 
the narrow tubes comes to stand under the 
end of C. When it is sufficiently filled, the 
Fig. 8. experiment is finished, and the tube is sealed. 
By adetermination of the solution point, we knew at the observed boiling 
temperature the concentration of the vapour, while the composition 
of the liquids was found froin the solubility curve. We made this 
experiment at three different pressures with the results given in 
table 4 and drawn in fig. 7. 
ASB! EE 34. 
Pp t XG 
444 mm 24,49 190/, 
600 915 24 
688 40.2 30 
