Subject: How do you experimentally measure partial pressures in a mixture of gases?

In a two component liquid / vapour system of volatile liquids that shows strong 
deviations from Raoult's Law it is easy to measure the TOTAL pressure of the 
system as a function of compostion by using a manometer, etc.  Is there any 
simple way to experimentally measure the PARTIAL pressure of each component in 
the mixture of vapours?  I am asking this because Raoult's Law deals with 
partial pressures and so I assume that it must be possible to actually measure 
them, but I can't think how this might be done.

Re: How do you experimentally measure partial pressures in a mixture of gases?