Abstract
The aerodynamic size distribution of cigarette smoke was measured using an aerosol centrifuge and a cascade impactor. The observed size distribution was fog normal with an initial mass median aerodynamic diameter which decreased from 0.52 to 0.38 µm as the dilution was increased from 10:1 to 700:1. The average geometric standard deviation was 1.38. The differences between these results and those reported by other investigators are attributed to differences in measurement methods.

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