The various processes involved in moisture movement in wood are described, and appropriateequations with parameters are presented. The processes are: 1) heat transfer through the boundary layer in response to a temperature differential; 2) heat conduction in wood in accordance with Fourier's equations; 3) bound-water diffusion in response to a vapor pressure gradient; 4) capillary flow in response to net surface tension forces determined by the free-water differential; 5) evaporation from the wood surface due to a vapor pressure differential between a wood surface and the kiln atmosphere; and 6) the transport of latent heat (activation energy) by diffusing and evaporating molecules. Equations for vapor pressure, RH, and heat conductivity are obtained from the literature and, where necessary, parameters determined by least-squares fit of published data. Boundary layer heat and moisture transfer coefficients are calculated from drying rate data when the surface MC exceeds fiber saturation point. Equations and parameters involved in capillary flow, and the relationship between moisture diffusion coefficient and MC are determined indirectly from experimental data. -- AATA