The range of applicability and the level of accuracy of the Wilson, Carman-Haul, and Crank equations and Shibusawa's approximations are revealed through detailed numerical computations. Also discussed is a calculator program which completely automates the computations involved in describing finite and infinite bath diffusion in a cylinder, resulting in a general accuracy to 4-5 significant figures in Mt/M α or (Dt/r2)1/2,
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