The critical point of CO2+N2: an experiment inspired by Notes and Records

Summary Although we have only recently become regular readers of Notes and Records, we believe that it must be relatively rare for an article to inspire a new experiment. However, this note describes a very recent case where it happened to us. A paper describing work by Thomas Andrews FRS on high pressure mixtures of CO2+N2 prompted us to make a series of measurements using a newly developed technique for locating critical point.