Upon discovering these bloodsucking little beasts residing on Miss Precious or Max, folks typically whip into a frenzy of
chemical counter measures — especially in the case of fleas, which exhibit an unhappy tendency to spread to the rest of the house.
The CLOUD experiment
measured the sulphuric acid vapour concentration using a
Chemical Ion Mass Spectrometer, the ion concentration using a Gerdien
counter, and the formation rate of particles at different sizes were
measured using multiple instruments described in the Methods section of Kirkby et al. (2011), with 50 % cutoff diameters between 1.3 nm and 12 nm.