Interactions between basswood, eastern white pine, and radiata pine and several water-soluble organic solvents were investigated with the primary interest focused on the penetration and swelling of cell-wall capillaries. The water-soluble solvents used were ethylene glycol monobutyl ether (EGMBE), diethylene glycol monobutyl ether (DEGMBE), and ethylene glycol. Cell-wall capillary penetration was ascertained by measuring the residual volumetric swelling of the wood after treatment and redrying. -- AATA