889 
by putting Q—=a-+ 547 in the formula 
dinp Q 
Er Tt 
If we had to do with one and the same vapour pressure line, 
about 50 atm. would have to be found for that pressure. 
If on the other hand the pseudo system exhibits the type ether- 
anthraquinone, and the vapour pressure line of the liquid white 
phosphorus possesses a critical point below 610°, the prolongation 
of that line above this critical temperature will of course have no 
physical significance, but if this prolongation points to a pressure 
higher than 50 atmospheres at 610° the question put above will be 
answered by this. The result of the extrapolation was that at 610° 
the pressure would amount to about 350 atmospheres. This result 
is so convincing that it shows the erroneousness of the earlier view 
with perfect certainty, so that it may be considered indisputable 
already now that the view about the type of the pseudo-system has 
been correct °). ; 
Li je 460° oe 
1) Also the system cyanogen has been investigated and conforms entirely to 
that of phosphorus. In the same way as for phosphorus we have succeeded in 
showing by means of experiments of solidification that we have to do with diffe- 
rent kinds of molecules, which can be in equilibrium with each other in solid and 
liquid cyanogen. 
