A description is given of an apparatus, based on a direct sampling technique, for measuring the velocities of falling drops in sprays. The results obtained for drops of different mean diameters in a single spray are given. The apparatus gives satisfactory results for drops of mean diameter 0.200 mm or more, provided a sufficient number of drops are captured in a sample and a sufficient number of samples are collected.
The theory of the apparatus is presented, ana experimental errors and the reasons for deviations from true drop velocity are discussed.