1. A rank-size distribution is not a probability distribution or cumulative distribution function. 2. Qualitatively, the aerosols appear dense with a moderately narrow particle size distribution . 3. Special instruments could measure plankton-, particle-, and bubble-concentrations and their size distributions . 4. The distance distribution function should not be confused with the size distribution . 5. The size distribution of the aggregate determines how much binder is required. 6. Therefore, the Smoluchowski coagulation equation is an integrodifferential equation of the particle-size distribution . 7. Soil gradation is a classification of the particle size distribution of a soil. 8. One also usefully can approximate the particle size distribution using a mathematical function. 9. Like the VPM, RGBM assumes the size distribution is exponentially decreasing in size. 10. These methods include several different techniques for characterizing particle size distribution .