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Analysis of the parameters recovered by the model indicate two facts. First the drift velocity v is has an average value of 0.053 in./sec (3.2 in./min.). The actual propulsion is probably much higher, but for the moment we only have access to outputs that have passed through one or two layers of clothing. The other driver of the spread of smell is diffusion, with the average diffusivity coefficient D being 0.17 in2/second. Based on these two facts, we can then calculate that the average fart diffuses according to the following space-time relationships: